P0638, fixed, cleared code, then no start

   #1  

bill1975

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Well I'm back again. 2011 A3 TDI CBEA engine...

Last night the glow plug light started blinking and the CEL came on, but the car was running normally. I did not save the auto scan, but I did pull P0638 - Throttle Body Actuator (J338), Bank 1 - Range/Performance Problem/Implausible Signal.

So today I removed the throttle body (I know TDI's don't need a throttle body, and this one actually regulates the EGR), and cleaned all the carbon from the inside. The butterfly seemed to move much more smoothly afterwards. Put everything together, cleared the codes, and took it out for a drive. I thought there was an adaptation to be done, but was unable to do it. Apparently it doesn't need to be done on a TDI, according to the Ross Tech Throttle Body Alignment video on youtube. Car ran really well. Went into a store for about an hour, and it wouldn't start. I had to crank if for 10 seconds, and it started a bit rough then smoothed out. Drove home and everything again was fine. I did another autoscan and saved it this time. No new codes, the three that are there are preexisting, I addressed those in another topic. But here it is anyway:

Code:
Sunday,19,January,2020,20:19:07:53989
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 19.6.2.0 (x64)
Data version: 20190930 DS308.0
www.Ross-Tech.com


VIN: WAUBJBFM6BA046812   License Plate: 
Mileage: 144780km-89962mi   Repair Order: 



--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


Chassis Type: FM-AU35 (8P0)
Scan: 01 02 03 08 09 0F 15 16 17 19 25 42 44 46 47 4C 52 56 62 72
          77

VIN: WAUBJBFM6BA046812   Mileage: 144780km-89962miles

01-Engine -- Status: OK 0000
02-Auto Trans -- Status: OK 0000
03-ABS Brakes -- Status: OK 0000
04-Steering Angle -- Status: OK 0000
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: Malfunction 0010
0F-Digital Radio -- Status: OK 0000
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: Malfunction 0010
19-CAN Gateway -- Status: OK 0000
25-Immobilizer -- Status: OK 0000
42-Door Elect, Driver -- Status: Malfunction 0010
44-Steering Assist -- Status: OK 0000
46-Central Conv. -- Status: OK 0000
47-Sound System -- Status: OK 0000
4C-Tire Pressure II -- Status: OK 0000
52-Door Elect, Pass. -- Status: OK 0000
56-Radio -- Status: OK 0000
62-Door, Rear Left -- Status: OK 0000
72-Door, Rear Right -- Status: OK 0000
77-Telephone -- Status: OK 0000
 
-------------------------------------------------------------------------------
Address 01: Engine (CBE)       Labels: 03L-906-022-CBE.clb
   Part No SW: 03L 997 030 R    HW: 03L 906 019 CT
   Component: R4 2.0l TDI G000AG  9983  
   Revision: 12H08---    Serial number: AUX7Z0J8FN10EJ
   Coding: 0350078
   Shop #: WSC 09198 003 1048576
   VCID: 3D70BF6464A34BA78C-8068

No fault code found.
Readiness: 0 0 0 0 1 

-------------------------------------------------------------------------------
Address 02: Auto Trans        Labels: 02E-927-770.clb
   Part No SW: 02E 300 052 G    HW: 02E 927 770 AL
   Component: GSG DSG AG6     511 9136  
   Revision: 05151112    Serial number: 00001008200462
   Coding: 0000020
   Shop #: WSC 06314 000 00000
   VCID: 183E4EF02B414E8F7F-804C

No fault code found.

-------------------------------------------------------------------------------
Address 03: ABS Brakes (J104)       Labels:. 1K0-907-379-60EC1F.clb
   Part No SW: 1K0 907 379 BG    HW: 1K0 907 379 BG
   Component: ESP MK60EC1   H31 0106  
   Revision: 00H31001    
   Coding: 1150400F49260000881302E5921B0042BF0C00
   Shop #: WSC 06314 000 00000
   VCID: 78FE6E70CB01AE8F9F-802C

No fault code found.

-------------------------------------------------------------------------------
Address 08: Auto HVAC        Labels: 8P0-820-043.lbl
   Part No SW: 8P0 820 043 BN    HW: 8P0 820 043 BN
   Component: KlimavollautomatH09 0170  
   Revision: 000311      Serial number: 8P0820043BN   
   Shop #: WSC 00000 000 00000
   VCID: 79F86B74300BB787E0-802C

No fault code found.

-------------------------------------------------------------------------------
Address 09: Cent. Elect. (J519)       Labels:. 8P0-907-063.clb
   Part No SW: 8P0 907 063 Q    HW: 8P0 907 063 K
   Component: BCM PQ35  M   107 0719  
   Revision: 00107 AF    
   Coding: 6E000A2FA01336E4287041E00000054D401A60AA104DC128E40008800040
   Shop #: WSC 09198 003 1048576
   VCID: 428ACC98DD5D345FF1-8016

   Subsystem 1 - Part No SW: 8P1 955 119 F    HW: 8P1 955 119 F  Labels: 1KX-955-119.CLB
   Component: Wischer AU350  H10 0050 
   Coding: 00DD13

   Subsystem 2 - Part No: 1K0 951 605 C
   Component: LIN BACKUP HO  H05 1501 

1 Fault Found:
01134 - Alarm Horn (H12) 
            000 - -
             Freeze Frame:
                    Fault Status: 01100000
                    Fault Priority: 4
                    Fault Frequency: 1
                    Reset counter: 62
                    Mileage: 144737 km
                    Time Indication: 0
                    Date: 2020.01.19
                    Time: 15:31:03

             Freeze Frame:
                        Term 15 Off
                    Voltage: 14.30 V
                        OFF
                        ON
                        Term 50 Off
                        OFF
                        ON


-------------------------------------------------------------------------------
Address 0F: Digital Radio        Labels: 8E0-035-593-SIR.lbl
   Part No SW: 8E0 035 593 P    HW: 8E0 035 593 P
   Component: SDAR SIRIUS     H07 0160  
   Revision: 00000000    Serial number: AUZ4Z7K0587993
   Coding: 0000100
   Shop #: WSC 06314 000 00000
   VCID: 3662A048419598FF4D-8062

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags (J234)       Labels:* 8P0-959-655-10.clb
   Part No SW: 8P0 959 655 Q    HW: 8P0 959 655 Q
   Component: Airbag AU1042 H07 0200  
   Revision: --------    Serial number: 003FC001ATTD
   Coding: 303142393041303030384A55304C38503053
   Shop #: WSC 06314 000 00000
   ASAM Dataset: EV_Airba10AURB4 001001
   ROD: EV_Airba10AURB4.rod
   VCID: 50AEF6D00B31D6CF77-8004

   Seat occupied recognition: 
   Subsystem 1 - Part No SW: 8P0 910 339 C    HW: 8P0 959 339 C
   Component: BF-Gewichtss.  H02 0030 
   Serial number: 5810000R0000004WTY
   Coding: 000000

   Crash sensor for side airbag: driver side: 
   Serial number: 3572DRB40000C78931A-

   Crash sensor for side airbag: front passenger side: 
   Serial number: 3582DRB40000C7892A0Z

   Crash sensor for side airbag: rear: driver side: 
   Serial number: 35128RB400005C0A791J

   Crash sensor for side airbag: rear: passenger side: 
   Serial number: 35228RB400005C0AF1EX

   Crash sensor for front airbag: driver side: 
   Serial number: 35547RB400005C63859S

   Crash sensor for front airbag: front passenger side: 
   Serial number: 35647RB400005C63855P

No fault code found.

-------------------------------------------------------------------------------
Address 16: Steering wheel        Labels: 8P0-953-549.lbl
   Part No SW: 8P0 953 549 K    HW: 8P0 953 549 K
   Component: J0527           H37 0070  
   Coding: 0014042
   Shop #: WSC 06314 000 00000
   VCID: 4682D0883175087FDD-8012

   Subsystem 1 - Part No: XXXXXXXXXXX 
   Component: E0221           H04 0100

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments        Labels: 8P0-920-xxx-17-MY8.clb
   Part No SW: 8P0 920 982 S    HW: 8P0 920 982 S
   Component: KOMBIINSTR. VDO H01 0090  
   Revision: D0H01003    Serial number: 2248J003001632
   Coding: 0272288
   Shop #: WSC 31198 001 1048576
   VCID: 4998DBB4206BE70730-801C

1 Fault Found:
00003 - Control Module 
            005 - No or Incorrect Basic Setting / Adaptation
             Freeze Frame:
                    Fault Status: 01100101
                    Fault Priority: 6
                    Fault Frequency: 1
                    Reset counter: 255
                    Mileage: 144430 km
                    Time Indication: 0
                    Date: 2020.01.16
                    Time: 18:32:05


-------------------------------------------------------------------------------
Address 19: CAN Gateway        Labels:. 7N0-907-530-V1.clb
   Part No SW: 8P0 907 530     HW: 1K0 907 951 
   Component: J533  Gateway   H32 5304  
   Revision:   H32       Serial number: 290710F2001674
   Coding: ED907F0610070200002102
   Shop #: WSC 06314 000 00000
   VCID: 70EE56506371F6CF57-8024

No fault code found.

-------------------------------------------------------------------------------
Address 25: Immobilizer        Labels: 1K0-920-xxx-25.clb
   Part No SW: 8P0 920 982 S    HW: 8P0 920 982 S
   Component: KOMBIINSTR. VDO H01 0090  
   Revision: D0H01003    Serial number: AUX7Z0J8FN10EJ
   Shop #: WSC 31198 001 1048576
   VCID: 4998DBB4206BE70730-801C

No fault code found.

-------------------------------------------------------------------------------
Address 42: Door Elect, Driver        Labels: 8P0-959-801-MIN3.lbl
   Part No SW: 8P0 959 801 Q    HW: 8P0 959 801 Q
   Component: Tuer-SG         H04 0101  
   Coding: 0001205
   Shop #: WSC 06314 000 00000
   VCID: 4998DBB4206BE70730-801C

1 Fault Found:
00943 - Heated Exterior Mirror; Driver Side (Z4) 
            012 - Electrical Fault in Circuit

-------------------------------------------------------------------------------
Address 44: Steering Assist        Labels: 1K0-909-14x-GEN3.clb
   Part No: 1K0 909 144 J
   Component: EPS_ZFLS Kl. 232    3001  
   Revision: 00H17000    
   Shop #: WSC 02069 000 90108
   VCID: 31689354A8FBBFC718-8064

No fault code found.

-------------------------------------------------------------------------------
Address 47: Sound System        Labels: 8Px-035-382.lbl
   Part No SW: 8P4 035 382 E    HW: 8P4 035 382 E
   Component: AB2 SUBWOOFERBOXH07 0180  
   Revision: 00006       Serial number: 92158086279092
   Shop #: WSC 00000 000 00000
   VCID: 3662A048419598FF4D-8062

No fault code found.

-------------------------------------------------------------------------------
Address 52: Door Elect, Pass.        Labels:. 1K0-959-702-MIN3.clb
   Part No SW: 8P0 959 802 Q    HW: 8P0 959 802 Q
   Component: Tuer-SG         H04 0101  
   Coding: 0001205
   Shop #: WSC 06314 000 00000
   VCID: 4A9AE4B8256DEC1F39-801E

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio        Labels: 8J0-035-1xx-56.clb
   Part No SW: 8P0 035 186 AC    HW: 8P0 035 186 AC
   Component: R Concert2+     H02 0293  
   Revision: 00H02000    Serial number: AUZ1Z3K1264127
   Coding: 0750112
   Shop #: WSC 06314 000 00000
   VCID: 73E4595C1267CDD7AA-8026

No fault code found.

-------------------------------------------------------------------------------
Address 62: Door, Rear Left        Labels: 8P4-959-801.lbl
   Part No SW: 8P4 959 801 F    HW: 8P4 959 801 F
   Component: Tuer-SG         H04 0050  
   Coding: 0001168
   Shop #: WSC 06314 000 1012544
   VCID: 428ACC981D5D345FF1-8016

No fault code found.

-------------------------------------------------------------------------------
Address 72: Door, Rear Right        Labels: 8P4-959-802.lbl
   Part No SW: 8P4 959 802 F    HW: 8P4 959 802 F
   Component: Tuer-SG         H04 0050  
   Coding: 0001168
   Shop #: WSC 06314 000 1012544
   VCID: 4384C99C02473D57FA-8016

No fault code found.

-------------------------------------------------------------------------------
Address 77: Telephone        Labels: 8P0-862-335.lbl
   Part No SW: 8P1 862 336     HW: 8P1 862 336 
   Component: FSE_256x BT     H41 0650  
   Revision: 00000000    Serial number: 00000005038769
   Coding: 0001277
   Shop #: WSC 06314 000 00000
   VCID: 75E067441C13D3E784-8020

No fault code found.

End-------------------------(Elapsed Time: 02:19)--------------------------
So whatever triggered the no start didnt store a code or set off the CEL. I might go on a drive in an hour or two after the car cools off to see if I can replicate it. Just not sure of this is a "one off" anomaly related to the TB cleaning or a sign of something else.
 
   #2  

Uwe

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Actually, I think there is a Basic Setting for the "Throttle Valve Control Module (J338)" in Group 124 on that engine, but I've never done it and don't have a detailed procedure handy for it.

-Uwe-
 
   #3  

bill1975

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I will have to go back and check. This Ross Tech video showed three examples, but none of them seemed to work with my car. I tried going into engine>basic settings and selected throttle adaptation from the drop down menu. I saw some numbers change when I hit "on/off" but didn't hear anything happen. The video suggested that an error might occur if you have a TDI. Later, I tried the output test for the throttle valve, and it worked ok, as I could hear it opening and closing. Dont know if this potentially affected anything.
 
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Uwe

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I will have to go back and check. This Ross Tech video showed three examples, but none of them seemed to work with my car. I tried going into engine>basic settings and selected throttle adaptation from the drop down menu. I saw some numbers change when I hit "on/off" but didn't hear anything happen. The video suggested that an error might occur if you have a TDI. Later, I tried the output test for the throttle valve, and it worked ok, as I could hear it opening and closing. Dont know if this potentially affected anything.
Those are traditional gasoline throttle bodies, which are the primary means of controlling the power produced by a gasoline engine. The engine management supplies an appropriate amount of fuel to match however much air the engine is getting.

A diesel works differently. Traditionally, they ran completely un-throttled, getting full airflow at all times, and the amount of power they produced was controlled by fuel flow. The problem with this is that it results in a very lean mixture under all conditions except full power output, and this produces lots of NOx emissions. The "fix" for that is to replace a good bit of the air that the engine would normally pull in with recirculated exhaust gas. In order to control this precisely, "throttles" we added to diesel engines as well, but they don't perform the same function in a diesel; they still don't control the power output; they just control (restrict) the amount of excess oxygen present during combustion.

-Uwe-
 
   #5  

bill1975

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Thanks Uwe, I read something similar regarding diesel engines. Perhaps it was a coincidence of some kind. The only thing I can think of is when I unplugged the throttle valve/anti-shudder valve, that some other part of the car had to adapt or adjust. I know diesels can be hard to start in cold weather but it was only around 50 deg outside. It could also be the fuel filter, as I just purchased the car about three weeks ago, so I don't know if it has been replaced.

Otherwise, it ran just fine all day today.
 
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Jack@European_Parts

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Did you check the harness for chafe damage in front by head just behind oil filter?

Did you log G28 & G40 when cranking?
 
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bill1975

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I did not, but I can go try that right now.
 
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bill1975

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Here are the logs for groups 28 and 40. I did not see or feel any chafing on the wiring near the oil filter.

Code:
Monday	20	January	2020	22:22:52:53989-VCID:3D70BF6464A34BA78C-8068	VCDS Version: Release 19.6.2 (x64)	Data version: 20190930 DS308.0					
03L 997 030 R		R4 2.0l TDI G000AG  9983									
											
	Group A:	'028				Group B:	'040				
		RPM	Ign. Timing(no units)	Pressure  RPM	Load	Lambda	Lambda	
	TIME					TIME					
Marker	STAMP	 /min	 °BTDC		 bar	STAMP	 /min	 %	 %	 %
	0.01	0	0	0	8	0.12	0	100	99.4	4.7	
	0.26	0	0	0	8	0.38	0	100	99.4	4.7	
	0.51	0	0	0	8	0.64	0	100	99.4	4.7	
	0.78	0	0	0	8	0.9	0	100	99.4	4.7	
	1.03	0	0	0	0	1.15	0	100	99.4	4.7	
	1.29	0	0	0	8	1.42	0	100	99.4	4.7	
	1.54	0	0	0	8	1.67	0	100	99.4	4.7	
	1.81	0	0	0	0	1.93	0	100	99.4	4.7	
	2.06	0	0	0	0	2.18	0	100	99.4	4.7	
	2.32	0	0	0	8	2.45	0	100	99.4	4.7	
	2.57	0	0	0	8	2.7	0	100	99.4	4.7	
	2.84	0	0	0	8	2.96	0	100	99.4	4.7	
	3.09	0	0	0	0	3.21	0	100	99.4	4.7	
	3.36	0	0	0	0	3.48	0	100	99.4	4.7	
	3.6	0	0	0	0	3.73	0	100	99.4	4.7	
	3.87	0	0	0	0	3.99	0	100	99.4	4.7	
	4.12	0	0	0	0	4.25	138	100	99.4	4.7	
	4.39	184	0	0	88	4.51	230	100	99.4	4.7	
	4.63	368	0	0	288	4.76	529	100	99.4	4.7	
	4.91	943	0	0	464	5.03	943	100	99.4	4.7	
	5.16	966	0	0	432	5.28	943	100	99.4	4.7	
	5.42	966	0	0	376	5.54	943	100	99.4	4.7	
	5.67	943	0	0	360	5.79	920	100	99.4	4.7	
	5.94	920	0	0	352	6.06	920	100	99.4	4.7	
	6.19	897	0	0	352	6.31	874	100	99.4	4.7	
	6.45	874	0	0	344	6.58	897	100	99.4	4.7	
	6.7	874	0	0	360	6.82	851	100	99.4	4.7	
	6.97	897	0	0	352	7.09	828	100	99.4	4.7	
	7.22	897	0	0	360	7.34	828	100	99.4	4.7	
	7.49	874	0	0	352	7.61	897	100	99.4	4.7	
	7.73	897	0	0	360	7.86	874	100	99.4	4.7	
	8	897	0	0	360	8.12	851	100	99.4	4.7	
	8.25	874	0	0	360	8.38	874	100	99.4	4.7	
	8.52	874	0	0	352	8.64	897	100	99.4	4.7	
	8.76	874	0	0	352	8.89	874	100	99.4	4.7	
	9.03	874	0	0	344	9.15	874	100	99.4	4.7	
	9.28	851	0	0	352	9.41	851	100	99.4	4.7	
	9.55	851	0	0	344	9.67	851	100	99.4	4.7	
	9.8	851	0	0	344	9.92	851	100	99.4	4.7	
	10.07	851	0	0	344	10.18	851	100	99.4	4.7	
	10.31	828	0	0	336	10.44	828	100	99.4	4.7	
	10.58	828	0	0	344	10.7	828	100	99.4	4.7	
	10.83	828	0	0	344	10.95	828	100	99.4	4.7	
	11.09	828	0	0	344	11.22	828	100	99.4	4.7	
	11.34	828	0	0	344	11.47	828	100	99.4	4.7	
	11.61	828	0	0	344	11.73	805	100	99.4	4.7	
	11.86	828	0	0	344	11.98	828	100	99.4	4.7	
	12.12	828	0	0	336	12.25	828	100	99.4	4.7	
	12.38	828	0	0	336	12.5	828	100	99.4	4.7	
	12.64	828	0	0	336	12.76	828	100	99.4	4.7	
	12.89	828	0	0	344	13.01	828	100	99.4	4.7	
	13.15	828	0	0	336	13.28	828	100	99.4	4.7	
	13.41	828	0	0	336	13.53	828	100	99.4	4.7	
	13.67	828	0	0	336	13.79	828	100	99.4	4.7	
	13.92	828	0	0	336	14.04	828	100	99.4	4.7	
	14.18	828	0	0	336	14.31	828	100	99.4	4.7	
	14.44	828	0	0	336	14.56	828	100	99.4	4.7	
	14.7	828	0	0	336	14.82	828	100	99.4	4.7	
	14.95	828	0	0	336	15.07	828	100	99.4	4.7	
	15.22	828	0	0	336	15.34	828	100	99.4	4.7	
	15.47	828	0	0	336	15.59	828	100	99.4	4.7	
	15.73	828	0	0	336	15.86	828	100	99.4	4.7	
	15.98	828	0	0	336	16.11	828	100	99.4	4.7	
	16.25	828	0	0	336	16.37	828	100	99.4	4.7	
	16.5	828	0	0	336	16.63	828	100	99.4	4.7	
	16.76	828	0	0	336	16.89	828	100	99.4	4.7	
	17.01	828	0	0	336	17.14	828	100	99.4	4.7	
	17.28	828	0	0	336	17.41	828	100	99.4	4.7	
	17.53	828	0	0	336	17.66	828	100	99.4	4.7	
	17.79	828	0	0	336	17.92	828	100	99.4	4.7	
	18.04	828	0	0	336	18.17	828	100	99.4	4.7	
	18.31	828	0	0	336	18.43	828	100	99.4	4.7	
	18.56	828	0	0	336	18.68	828	100	99.4	4.7	
	18.83	828	0	0	336	18.95	828	100	99.4	4.7	
	19.07	828	0	0	336	19.2	828	100	99.4	4.7	
	19.35	828	0	0	336	19.47	828	100	99.4	4.7	
	19.59	828	0	0	336	19.72	828	100	99.4	4.7	
	19.86	828	0	0	336	19.98	828	100	99.4	4.7	
	20.11	828	0	0	336	20.23	828	100	99.4	4.7	
	20.38	828	0	0	336	20.51	828	100	99.4	4.7	
	20.64	828	0	0	336	20.76	828	100	99.4	4.7	
	20.9	828	0	0	336	21.03	828	100	99.4	4.7	
	21.15	828	0	0	336	21.28	828	100	99.4	4.7	
	21.42	828	0	0	336	21.54	828	100	99.4	4.7	
	21.67	828	0	0	336	21.79	828	100	99.4	4.7	
	21.93	828	0	0	336	22.06	828	100	99.4	4.7	
	22.18	828	0	0	336	22.31	828	100	99.4	4.7	
	22.45	828	0	0	336	22.57	828	100	99.4	4.7	
	22.7	828	0	0	336	22.83	828	100	99.4	4.7	
	22.97	828	0	0	336	23.09	828	100	99.4	4.7	
	23.21	828	0	0	336	23.34	828	100	99.4	4.7	
	23.48	828	0	0	336	23.61	828	100	99.4	4.7	
	23.73	828	0	0	336	23.86	828	100	99.4	4.7	
	24	828	0	0	336	24.12	828	100	99.4	4.7	
	24.24	828	0	0	336	24.37	828	100	99.4	4.7
 
   #11  

Jack@European_Parts

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Did you know you can use VCDS to teach yourself using VCDS blocks & how to back trace by unplugging sensor on rail and observation of DTC/blocks to reflect the value if you believe a caption isn't documented, now did you read VCDS captions?
 
   #12  

bill1975

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I did not, I'm still learning my way around parts of the program, and am a novice with it. Did the log I post show anything of significance? Other than the engine speed, I do not know what the values of those fields are supposed to be.
 
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   #13  

Jack@European_Parts

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Read the blocks and captions in VCDS and you tell me?

I see pressures and RPM of something in that log what blocks are they identified as in VCDS captions?
 
   #14  

bill1975

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Group 28 shows: engine RPM, ignition timing, *empty block*, and pressure (of what? Hpfp maybe?)

Group 40 shows: engine RPM, load (of what?), Lambda, Lambda

Hovering the mouse over each block does not show any captions. In some groups it does, but for whatever reason it is not doing so here, so I am unable to interpret what the values mean and what the specified range is. The manual talks about label files, but I am unable to read them when they are opened since they're encrypted
 
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   #15  

Uwe

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Group 28 shows: engine RPM, ignition timing, *empty block*, and pressure (of what? Hpfp maybe?)
Group 40 shows: engine RPM, load (of what?), Lambda, Lambda
Groups 028 and 040 were never documented by VW as far as I can tell.

Fuel pressure should be in 020 and/or 021.

-Uwe-
 
   #16  

bill1975

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Groups 028 and 040 were never documented by VW as far as I can tell.

Fuel pressure should be in 020 and/or 021.

-Uwe-
Thanks Uwe. Both those channels show the same data, I logged both of them.

Based on the captions in VCDS, everything looks normal except "High Fuel Pressure (specified), in group 20, "High Fuel Pressure (specified)" shows it should have a range of 250-300 bar at idle, while in group 21 it shows that it should read 220-330 bar at idle. The log shows it settles at 336 bar. a minute or two later after the logging stopped it went to 328 bar. I'm not sure what that is linked to. Here is the log:

Code:
Tuesday	21	January	2020	18:14:10:53989-VCID:3D70BF6464A34BA78C-8068	VCDS Version: Release 19.6.2 (x64)	Data version: 20190930 DS308.0				
03L 997 030 R		R4 2.0l TDI G000AG  9983								
										
	Group A:	'020				Group B:	'021			
		Engine Speed	High Fuel Pressure	High Fuel Pressure	High Fuel Pressure		Engine Speed	High Fuel Pressure	High Fuel Pressure	Quantity Measuring
	TIME	(G28)	(specified)	(actual)	Control Valve	TIME	(G28)	(specified)	(actual)	Control Valve
Marker	STAMP	 /min	 bar	 bar	 %	STAMP	 /min	 bar	 bar	 %
	0.08	0	296	0	9.5	0.21	0	296	0	33.1
	0.32	0	296	0	9.5	0.45	0	296	0	33.1
	0.59	0	296	0	9.5	0.71	0	296	0	33.1
	0.84	0	296	0	9.5	0.96	0	296	0	33.1
	1.11	0	296	0	9.5	1.23	0	296	0	33.1
	1.35	0	296	0	9.5	1.48	0	296	0	33.1
	1.62	0	296	0	9.5	1.75	0	296	0	33.1
	1.87	0	296	0	9.5	1.99	0	296	0	33.1
	2.14	0	296	0	9.5	2.26	0	296	0	33.1
	2.38	0	296	0	9.5	2.51	0	296	0	33.1
	2.65	0	296	0	9.5	2.78	0	296	0	33.1
	2.9	0	296	0	9.5	3.03	0	296	0	33.1
	3.17	0	296	0	9.5	3.29	115	320	0	45.8
	3.41	161	344	16	31.6	3.54	184	344	72	41
	3.68	345	392	184	30	3.81	621	344	296	45.8
	3.93	989	520	408	30	4.06	1127	456	424	32.4
	4.2	1058	384	416	25.3	4.32	1035	336	384	33.1
	4.45	1012	320	360	23.7	4.57	989	320	344	33.9
	4.72	966	320	336	22.9	4.84	943	320	328	34.7
	4.96	943	320	328	22.1	5.09	920	320	328	34.7
	5.24	897	320	320	22.1	5.35	897	320	312	33.9
	5.48	874	320	304	21.3	5.6	874	320	312	33.1
	5.74	851	328	312	21.3	5.87	851	336	320	33.1
	6	828	336	328	21.3	6.12	828	336	328	32.4
	6.26	805	336	328	21.3	6.39	805	344	336	31.6
	6.51	828	344	336	20.5	6.64	805	344	336	30.8
	6.78	828	344	344	20.5	6.9	805	344	344	30.8
	7.03	828	344	344	20.5	7.15	828	344	344	30.8
	7.3	828	344	344	20.5	7.42	828	344	344	30.8
	7.54	828	344	336	20.5	7.67	828	344	344	30.8
	7.81	828	336	344	20.5	7.93	828	336	344	30.8
	8.06	828	336	344	20.5	8.18	828	336	344	30.8
	8.32	828	336	344	20.5	8.45	828	344	344	30.8
	8.57	828	336	336	20.5	8.7	828	336	336	30.8
	8.84	828	336	344	19.7	8.96	828	336	344	30.8
	9.09	828	336	344	20.5	9.21	828	336	336	30.8
	9.36	828	336	336	20.5	9.48	828	336	336	30.8
	9.6	828	336	336	19.7	9.73	828	336	336	30.8
	9.87	828	336	344	20.5	10	828	336	336	30.8
	10.12	828	336	336	20.5	10.24	828	336	336	30.8
	10.4	828	336	336	19.7	10.53	828	336	344	30.8
	10.65	828	336	344	19.7	10.78	828	336	336	30.8
	10.92	828	336	336	20.5	11.04	828	336	336	30.8
	11.17	828	336	336	19.7	11.29	828	336	344	30.8
	11.43	828	336	344	20.5	11.56	828	336	336	30.8
	11.68	828	336	336	20.5	11.81	828	336	336	30.8
	11.95	828	336	336	19.7	12.08	828	336	336	30.8
	12.2	828	336	336	19.7	12.32	828	336	336	30.8
	12.46	828	336	336	19.7	12.59	828	336	336	30.8
	12.71	828	336	336	19.7	12.84	828	336	336	30.8
	12.98	828	336	336	19.7	13.11	828	336	336	30.8
	13.23	828	336	336	19.7	13.35	828	336	336	30.8
	13.5	828	336	336	19.7	13.62	828	336	336	30.8
	13.74	828	336	336	19.7	13.87	828	336	336	30.8
	14.01	828	336	336	19.7	14.14	828	336	336	30.8
	14.26	828	336	336	19.7	14.39	828	336	336	30.8
	14.53	828	336	336	19.7	14.65	828	336	336	30.8
	14.78	828	336	336	19.7	14.9	828	336	336	30.8
	15.04	828	336	336	19.7	15.17	828	336	336	30.8
	15.29	828	336	336	19.7	15.42	828	336	336	30.8
	15.57	828	336	336	19.7	15.7	828	336	344	30.8
	15.82	828	336	344	19.7	15.95	828	336	328	30.8
ALSO, after this, I ran an errand, when I came back the glow plug light was blinking again and it returned the same P0638 code. The car drove fine. I have no idea why the glow plug light comes on for things that have nothing to do with the glow plugs. I did an autoscan:

Code:
Tuesday,21,January,2020,19:17:41:53989
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 19.6.2.0 (x64)
Data version: 20190930 DS308.0
www.Ross-Tech.com


VIN: WAUBJBFM6BA046812   License Plate: 
Mileage: 144940km-90061mi   Repair Order: 



--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


Chassis Type: FM-AU35 (8P0)
Scan: 01 02 03 08 09 0F 15 16 17 19 25 42 44 46 47 4C 52 56 62 72
          77

VIN: WAUBJBFM6BA046812   Mileage: 144940km-90061miles

01-Engine -- Status: Malfunction 0010
02-Auto Trans -- Status: OK 0000
03-ABS Brakes -- Status: OK 0000
04-Steering Angle -- Status: OK 0000
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: Malfunction 0010
0F-Digital Radio -- Status: OK 0000
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: Malfunction 0010
19-CAN Gateway -- Status: OK 0000
25-Immobilizer -- Status: OK 0000
42-Door Elect, Driver -- Status: Malfunction 0010
44-Steering Assist -- Status: OK 0000
46-Central Conv. -- Status: OK 0000
47-Sound System -- Status: OK 0000
4C-Tire Pressure II -- Status: OK 0000
52-Door Elect, Pass. -- Status: OK 0000
56-Radio -- Status: OK 0000
62-Door, Rear Left -- Status: OK 0000
72-Door, Rear Right -- Status: OK 0000
77-Telephone -- Status: OK 0000
 
-------------------------------------------------------------------------------
Address 01: Engine (CBE)       Labels: 03L-906-022-CBE.clb
   Part No SW: 03L 997 030 R    HW: 03L 906 019 CT
   Component: R4 2.0l TDI G000AG  9983  
   Revision: 12H08---    Serial number: AUX7Z0J8FN10EJ
   Coding: 0350078
   Shop #: WSC 09198 003 1048576
   VCID: 3D70BF6464A34BA78C-8068

1 Fault Found:
001592 - Throttle Body Actuator Bank 1 (J338) 
               P0638 - 000 - Implausible Signal - MIL ON
             Freeze Frame:
                    Fault Status: 11100000
                    Fault Priority: 2
                    Fault Frequency: 1
                    Reset counter: 255
                    Mileage: 144930 km
                    Time Indication: 0
                    Date: 2020.01.21
                    Time: 18:59:07

             Freeze Frame:
                    RPM: 0 /min
                    Speed: 0.0 km/h
                    Voltage: 12.16 V
                    Lambda: 99.4 %
                    Bin. Bits: 00000000

Readiness: 0 0 0 1 1 

-------------------------------------------------------------------------------
Address 02: Auto Trans        Labels: 02E-927-770.clb
   Part No SW: 02E 300 052 G    HW: 02E 927 770 AL
   Component: GSG DSG AG6     511 9136  
   Revision: 05151112    Serial number: 00001008200462
   Coding: 0000020
   Shop #: WSC 06314 000 00000
   VCID: 183E4EF02B414E8F7F-804C

No fault code found.

-------------------------------------------------------------------------------
Address 03: ABS Brakes (J104)       Labels:. 1K0-907-379-60EC1F.clb
   Part No SW: 1K0 907 379 BG    HW: 1K0 907 379 BG
   Component: ESP MK60EC1   H31 0106  
   Revision: 00H31001    
   Coding: 1150400F49260000881302E5921B0042BF0C00
   Shop #: WSC 06314 000 00000
   VCID: 78FE6E70CB01AE8F9F-802C

No fault code found.

-------------------------------------------------------------------------------
Address 08: Auto HVAC        Labels: 8P0-820-043.lbl
   Part No SW: 8P0 820 043 BN    HW: 8P0 820 043 BN
   Component: KlimavollautomatH09 0170  
   Revision: 000311      Serial number: 8P0820043BN   
   Shop #: WSC 00000 000 00000
   VCID: 79F86B74300BB787E0-802C

No fault code found.

-------------------------------------------------------------------------------
Address 09: Cent. Elect.
Cannot be reached
Unable to communicate with address 09. Are you sure the doors are unlocked?

-------------------------------------------------------------------------------
Address 0F: Digital Radio        Labels: 8E0-035-593-SIR.lbl
   Part No SW: 8E0 035 593 P    HW: 8E0 035 593 P
   Component: SDAR SIRIUS     H07 0160  
   Revision: 00000000    Serial number: AUZ4Z7K0587993
   Coding: 0000100
   Shop #: WSC 06314 000 00000
   VCID: 3662A048419598FF4D-8062

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags (J234)       Labels:* 8P0-959-655-10.clb
   Part No SW: 8P0 959 655 Q    HW: 8P0 959 655 Q
   Component: Airbag AU1042 H07 0200  
   Revision: --------    Serial number: 003FC001ATTD
   Coding: 303142393041303030384A55304C38503053
   Shop #: WSC 06314 000 00000
   ASAM Dataset: EV_Airba10AURB4 001001
   ROD: EV_Airba10AURB4.rod
   VCID: 50AEF6D00B31D6CF77-8004

   Seat occupied recognition: 
   Subsystem 1 - Part No SW: 8P0 910 339 C    HW: 8P0 959 339 C
   Component: BF-Gewichtss.  H02 0030 
   Serial number: 5810000R0000004WTY
   Coding: 000000

   Crash sensor for side airbag: driver side: 
   Serial number: 3572DRB40000C78931A-

   Crash sensor for side airbag: front passenger side: 
   Serial number: 3582DRB40000C7892A0Z

   Crash sensor for side airbag: rear: driver side: 
   Serial number: 35128RB400005C0A791J

   Crash sensor for side airbag: rear: passenger side: 
   Serial number: 35228RB400005C0AF1EX

   Crash sensor for front airbag: driver side: 
   Serial number: 35547RB400005C63859S

   Crash sensor for front airbag: front passenger side: 
   Serial number: 35647RB400005C63855P

No fault code found.

-------------------------------------------------------------------------------
Address 16: Steering wheel        Labels: 8P0-953-549.lbl
   Part No SW: 8P0 953 549 K    HW: 8P0 953 549 K
   Component: J0527           H37 0070  
   Coding: 0014042
   Shop #: WSC 06314 000 00000
   VCID: 4682D0883175087FDD-8012

   Subsystem 1 - Part No: XXXXXXXXXXX 
   Component: E0221           H04 0100

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments        Labels: 8P0-920-xxx-17-MY8.clb
   Part No SW: 8P0 920 982 S    HW: 8P0 920 982 S
   Component: KOMBIINSTR. VDO H01 0090  
   Revision: D0H01003    Serial number: 2248J003001632
   Coding: 0272288
   Shop #: WSC 31198 001 1048576
   VCID: 4998DBB4206BE70730-801C

1 Fault Found:
00003 - Control Module 
            005 - No or Incorrect Basic Setting / Adaptation
             Freeze Frame:
                    Fault Status: 01100101
                    Fault Priority: 6
                    Fault Frequency: 1
                    Reset counter: 255
                    Mileage: 144786 km
                    Time Indication: 0
                    Date: 2020.01.19
                    Time: 20:20:29


-------------------------------------------------------------------------------
Address 19: CAN Gateway        Labels:. 7N0-907-530-V1.clb
   Part No SW: 8P0 907 530     HW: 1K0 907 951 
   Component: J533  Gateway   H32 5304  
   Revision:   H32       Serial number: 290710F2001674
   Coding: ED907F0610070200002102
   Shop #: WSC 06314 000 00000
   VCID: 70EE56506371F6CF57-8024

No fault code found.

-------------------------------------------------------------------------------
Address 25: Immobilizer        Labels: 1K0-920-xxx-25.clb
   Part No SW: 8P0 920 982 S    HW: 8P0 920 982 S
   Component: KOMBIINSTR. VDO H01 0090  
   Revision: D0H01003    Serial number: AUX7Z0J8FN10EJ
   Shop #: WSC 31198 001 1048576
   VCID: 4998DBB4206BE70730-801C

No fault code found.

-------------------------------------------------------------------------------
Address 42: Door Elect, Driver        Labels: 8P0-959-801-MIN3.lbl
   Part No SW: 8P0 959 801 Q    HW: 8P0 959 801 Q
   Component: Tuer-SG         H04 0101  
   Coding: 0001205
   Shop #: WSC 06314 000 00000
   VCID: 4998DBB4206BE70730-801C

1 Fault Found:
00943 - Heated Exterior Mirror; Driver Side (Z4) 
            012 - Electrical Fault in Circuit

-------------------------------------------------------------------------------
Address 44: Steering Assist        Labels: 1K0-909-14x-GEN3.clb
   Part No: 1K0 909 144 J
   Component: EPS_ZFLS Kl. 232    3001  
   Revision: 00H17000    
   Shop #: WSC 02069 000 90108
   VCID: 31689354A8FBBFC718-8064

No fault code found.

-------------------------------------------------------------------------------
Address 46: Central Conv.
Cannot be reached

-------------------------------------------------------------------------------
Address 47: Sound System        Labels: 8Px-035-382.lbl
   Part No SW: 8P4 035 382 E    HW: 8P4 035 382 E
   Component: AB2 SUBWOOFERBOXH07 0180  
   Revision: 00006       Serial number: 92158086279092
   Shop #: WSC 00000 000 00000
   VCID: 3662A048419598FF4D-8062

No fault code found.

-------------------------------------------------------------------------------
Address 52: Door Elect, Pass.        Labels:. 1K0-959-702-MIN3.clb
   Part No SW: 8P0 959 802 Q    HW: 8P0 959 802 Q
   Component: Tuer-SG         H04 0101  
   Coding: 0001205
   Shop #: WSC 06314 000 00000
   VCID: 4A9AE4B8256DEC1F39-801E

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio        Labels: 8J0-035-1xx-56.clb
   Part No SW: 8P0 035 186 AC    HW: 8P0 035 186 AC
   Component: R Concert2+     H02 0293  
   Revision: 00H02000    Serial number: AUZ1Z3K1264127
   Coding: 0750112
   Shop #: WSC 06314 000 00000
   VCID: 73E4595C1267CDD7AA-8026

No fault code found.

-------------------------------------------------------------------------------
Address 62: Door, Rear Left        Labels: 8P4-959-801.lbl
   Part No SW: 8P4 959 801 F    HW: 8P4 959 801 F
   Component: Tuer-SG         H04 0050  
   Coding: 0001168
   Shop #: WSC 06314 000 1012544
   VCID: 428ACC981D5D345FF1-8016

No fault code found.

-------------------------------------------------------------------------------
Address 72: Door, Rear Right        Labels: 8P4-959-802.lbl
   Part No SW: 8P4 959 802 F    HW: 8P4 959 802 F
   Component: Tuer-SG         H04 0050  
   Coding: 0001168
   Shop #: WSC 06314 000 1012544
   VCID: 4384C99C02473D57FA-8016

No fault code found.

-------------------------------------------------------------------------------
Address 77: Telephone        Labels: 8P0-862-335.lbl
   Part No SW: 8P1 862 336     HW: 8P1 862 336 
   Component: FSE_256x BT     H41 0650  
   Revision: 00000000    Serial number: 00000005038769
   Coding: 0001277
   Shop #: WSC 06314 000 00000
   VCID: 75E067441C13D3E784-8020

No fault code found.

End-------------------------(Elapsed Time: 02:17)--------------------------
So, my guess is that the Anti shudder valve (or throttle valve) could be faulty. I'm still not sure why the car suddenly was so difficult to start after I cleaned it, and since then has started and ran just fine. Also not sure if the slightly high fuel pressure is a concern.

Given the weird 00003 error code that neither I or you were able to figure out in a previous thread, is it possible there is an electrical issue? I checked the grounding point next to the battery and it was fine. I don't know if there are other grounds to look for, or if this is even worth pursuing.

A couple other points in case they are relevant - when I tested the battery with a multimeter, it showed 12.5v with the car off, and 13.8v with the car running, which seems good. Also, the resistance of the glow plugs seemed good (one plug showed 1.1 ohms, the other three were at .8 ohms
 
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   #17  

Jack@European_Parts

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C?ID=57337
1 Fault Found:
001592 - Throttle Body Actuator Bank 1 (J338)
P0638 - 000 - Implausible Signal - MIL ON
Freeze Frame:
Fault Status: 11100000
Fault Priority: 2
Fault Frequency: 1
Reset counter: 255
Mileage: 144930 km
Time Indication: 0
Date: 2020.01.21
Time: 18:59:07

Freeze Frame:
RPM: 0 /min
Speed: 0.0 km/h
Voltage: 12.16 V
Lambda: 99.4 %
Bin. Bits: 00000000
Dont you think if you fix this or wiring problems it would be a good start?

Most important question, isn't this repair under warranty extension and free or even under useful life warranty?
:p
 
   #18  

bill1975

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The first suggestion, from what I read, was to clean it, which I did a few days ago, as I mentioned in my first post. The code stayed away for a few days until this evening. On your suggestion, I looked at the wiring from the glow plug harness and it showed no wear. I have not yet traced the wiring from the ASV and when I looked at it over the weekend I could not see where it went to.

And yes, I assume the the ASV would be covered under the dieselgate warranty but I dont know for sure. I decided it would be easier to try cleaning it first then making a dealer appointment if needed.

On the other hand, I'm at least learning a few things here, getting practice with VCDS, and familiarizing myself with a new-to-me engine.
 
   #19  

Jack@European_Parts

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Isn't practically anything that would cause an MIL under such a warranty now that would make a vehicle fail SMOG?

If the Flap can't operate than EGR would suffer function, don't you just love the vicarious nature of all this?

Did you know your time spent and purchase of VCDS is reimbursable under useful life warranty?

Did you read the entire JPPSG yet, the whole thread?
:popcorn:
 
   #20  

bill1975

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Richardson, TX, USA
VCDS Serial number
C?ID=288000
Isn't practically anything that would cause an MIL under such a warranty now that would make a vehicle fail SMOG?
Perhaps, but whats the harm in trying to clean it out if its a potential easy fix?

If the Flap can't operate than EGR would suffer function, don't you just love the vicarious nature of all this?
Not sure how it is "vicarious"

Did you know your time spent and purchase of VCDS is reimbursable under useful life warranty?
"useful life warranty". First time I heard that term.

Did you read the entire JPPSG yet, the whole thread?
:popcorn:
Yup
 
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