G450 exhaust pressure sensor

   #1  

powerhouse820

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It's a 2010 Jetta tdi. I have replaced this sensor g450 to no avail. The code just comes right back on. I did the procedure through vag com. I have good signal from the ecm at about 5 volts blue wire ground checks out and while car is running I have .5-1.5v coming back through the signal wire. This is the sensor behind the oil cap. As far as the one next to it the signal line is reading a constant 5 volt, no matter what the rpm range. I also replaced this sensor, the dealer said they are the exact same sensor I just want to make sure, and where I can go from here to try and solve this. My soot load is 129ml at 12.9grams calculated the actual doesn't come up.
 
   #2  

Jack@European_Parts

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Are you sure you have the correct G450 installed for CJAA verse CBEA?




http://wiki.ross-tech.com/wiki/index.php/Special:Search?search=g450
http://wiki.ross-tech.com/wiki/index.php/16855/P0471/001137

Special Notes
  • This Fault Code often indicates an incorrect/incompatible Exhaust Pressure Sensor 1 (G450) being installed. VAG uses two different types of sensors:
    • through MY 2009 = 076-906-051-A (formerly 03G-906-051-A)
    • from MY 2010 = 076-906-051-B
If in doubt check the Part Number of the Exhaust Pressure Sensor 1 (G450) and compare it against the Parts Catalog.

  • With CBEA and CJAA engines, the factory documentation may show the wrong part location for the Exhaust Pressure Sensor 1 (G450). This sensor is in a foil pouch just behind the oil cap.
 
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   #3  

powerhouse820

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I have the b sensor for sure,
 
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powerhouse820

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As far as I know it seems to be reading correctly should I try an A sensor? I have about 3 of these and tried them all
 
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Jack@European_Parts

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Sure why not.......

You should swap sensors and see if DTC moves from one to the other, or a second fault occurs to isolate and verify the harness's ability or of ecu to detect the issue.
 
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Jef

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Two things... you need to post your Auto-Scan. Details here.

Second... how is the plumbing to/from the sensor?
 
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powerhouse820

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The plumbing I checked out. I will post the scan when I get home later. The lines are not clogged and blew through them. I swapped sensors and that does nothing same code still appears doesn't move. I also am going to drive the car tomorrow to work to see if anything else comes up. I had an Egr code in the past but it has not came back on. I don't know if this affects the system at all. Does anyone know the voltages that normally read from the sensors?
 
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Dana

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The voltage values vary based on the part number. I'm sure Peter has notes somewhere but we'd need the

Auto-Scan
Part numbers of the original pressure sensors (even if you only replaced one - please provide both numbers)
Part number of replacement sensor including the source (Dealer versus aftermarket/internet)
 
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   #9  

powerhouse820

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I will get you the auto scan as soon as possible I don't have the original sensors
 
   #10  

powerhouse820

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These are what I pulled

ok cleared all dtc car sat for a long time so im guessing a lot if issues was due to the low batterty.


Code:
VCDS Version: Release 15.7.1 (x64) Running on Windows 10 x64
Data version: 20150904
www.Ross-Tech.com

Monday,19,October,2015,20:03:38:11982

Chassis Type: AJ (1K0)
Scan: 01 02 03 08 09 15 16 17 19 1C 25 42 44 46 52 56 62 65 72 77
         

VIN: 3VWAL7AJ5AM020834   Mileage: 278640km-173138miles

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: OK 0000
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: Malfunction 0010
19-CAN Gateway -- Status: Malfunction 0010
1C-Position Sensing -- Status: OK 0000
25-Immobilizer -- Status: OK 0000
42-Door Elect, Driver -- Status: OK 0000
44-Steering Assist -- Status: OK 0000
46-Central Conv. -- Status: OK 0000
52-Door Elect, Pass. -- Status: OK 0000
56-Radio -- Status: Cannot be reached 1100
62-Door, Rear Left -- Status: OK 0000
65-Tire Pressure -- Status: Malfunction 0010
72-Door, Rear Right -- Status: Malfunction 0010
77-Telephone -- Status: Malfunction 0010
 
-------------------------------------------------------------------------------
Address 01: Engine (CJA)       Labels: 03L-906-022-CBE.clb
   Part No SW: 03L 906 019 CM    HW: 03L 906 022 TS
   Component: R4 2,0L EDC G000AG  7967  
   Revision: 12H02---    Serial number:               
   Coding: 0050078
   Shop #: WSC 08261 444 84834
   VCID: F8BCA2FB8BFD05FEE5-80AC

1 Fault Found:
001137 - Exhaust Pressure Sensor 1 (G450) 
               P0471 - 000 - Implausible Signal
             Freeze Frame:
                    Fault Status: 01100000
                    Fault Priority: 2
                    Fault Frequency: 1
                    Reset counter: 255
                    Mileage: 278642 km
                    Time Indication: 0
                    Date: 2010.03.11
                    Time: 20:05:31

             Freeze Frame:
                    RPM: 828 /min
                    Speed: 0.0 km/h
                    Temperature: 15.3°C
                    Temperature: 94.5°C
                    Temperature: 84.0°C
                    Pressure: -218 mbar
                    Pressure: -28 mbar

Readiness: 0 0 0 0 1 

-------------------------------------------------------------------------------
Address 02: Auto Trans        Labels: 02E-927-770.lbl
   Part No SW: 02E 300 052     HW: 02E 927 770 AJ
   Component: GSG DSG AG6     440 1920  
   Revision: 04844002    Serial number: 00000905020385
   Coding: 0000020
   Shop #: WSC 02069 000 90108
   VCID: D1EA3F5F48C774B602-8084

No fault code found.

-------------------------------------------------------------------------------
Address 03: ABS Brakes (-----)       Labels: 1K0-907-379-60EC1F.clb
   Part No SW: 1K0 907 379 AP    HW: 1K0 907 379 AP
   Component: ESP MK60EC1   H45 0107  
   Revision: 00H45001    
   Coding: 114B400C492400FA881302E7921D0042B100
   Shop #: WSC 00066 000 00000
   VCID: 804CCA1B132D4D3EDD-80D4

No fault code found.

-------------------------------------------------------------------------------
Address 08: Auto HVAC (J301)       Labels: 3C8-907-336.clb
   Part No SW: 3C8 907 336 N    HW: 3C8 907 336 N
   Component: Climatic      H13 0203  
   Revision: 00006001    
   Coding: 0000000000
   Shop #: WSC 00066 000 00150
   ASAM Dataset: EV_Climatic A01001
   ROD: EV_ClimaBasis_VW36.rod
   VCID: B83C62FB037DC5FE25-80EC

No fault code found.

-------------------------------------------------------------------------------
Address 09: Cent. Elect. (J519)       Labels: 1K0-937-08x-09.clb
   Part No SW: 5K0 937 085 C    HW: 5K0 937 085 C
   Component: BCM PQ35 B++  008 0019  
   Revision: BI008001    
   Coding: 6D200B1A902F3EE4800800054000000001000086510085605C8020000000
   Shop #: WSC 00066 000 00000
   VCID: B32655D7121B26A610-80E6

   Subsystem 1 - Part No: 1K1 955 119 E  Labels: 1KX-955-119.CLB
   Component: Wischer 06080  21  0501 
   Coding: 009795

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags        Labels: 1K0-909-605.lbl
   Part No SW: 1K0 909 605 AD    HW: 1K0 909 605 AD
   Component: 04 AIRBAG VW8R  036 8900  
   Revision: 06036000    Serial number: 003EVM00UYBG  
   Coding: 0012340
   Shop #: WSC 00066 000 00000
   VCID: EE9084A3F9B94B4E3F-80BA

   Subsystem 1 - Part No: 1K0 959 339 H
   Component: BF-Gewichtsens. 007 0006

   Subsystem 2 - Serial number: 6332MSME4776141FG

   Subsystem 3 - Serial number: 6342MSME49620955C

   Subsystem 4 - Serial number: 6351HSME1D0446443

   Subsystem 5 - Serial number: 6361HSME1D0A2F7FV

   Subsystem 6 - Serial number: 63727SME00015237L

   Subsystem 7 - Serial number: 63827SME00015C78.

No fault code found.

-------------------------------------------------------------------------------
Address 16: Steering wheel        Labels: 1K0-953-549-MY9.lbl
   Part No SW: 1K0 953 549 CD    HW: 1K0 953 549 CD
   Component: J0527           055 0111  
   Coding: 0001731
   Shop #: WSC 00066 000 00000
   VCID: F6A0ACC381E9738EF7-80A2

   Subsystem 1 - Part No: 5K0 959 542   Labels: 3C8-959-537.CLB
   Component: E221__MFL-TAS   H05 0010  
   Coding: 00000130
   Shop #: WSC 00000  

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments (J285)       Labels: 5K0-920-xxx-17.clb
   Part No SW: 5M0 920 970 C    HW: 5M0 920 970 C
   Component: KOMBI         H08 0021  
   Revision: V0008011    Serial number:               
   Coding: 271F00
   Shop #: WSC 00066 000 00150
   ASAM Dataset: EV_KombiUDSMM9RM10 A04010
   ROD: EV_KombiUDSMM9RM10_VW36.rod
   VCID: B02C5ADBEB0D1DBE6D-80E4

1 Fault Found:
13701120 - Function Restricted due to Interrupted Communications 
          U1110 00 [009] - -
          Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 6
                    Fault Frequency: 1
                    Reset counter: 231
                    Mileage: 278642 km
                    Date: 2015.10.19
                    Time: 19:59:02


-------------------------------------------------------------------------------
Address 19: CAN Gateway        Labels: 1K0-907-530-V4.clb
   Part No SW: 1K0 907 530 AA    HW: 1K0 907 951 
   Component: J533  Gateway   H07 0081  
   Revision:   H07 01    Serial number: 050609F2001107
   Coding: ED807F07001602001002
   Shop #: WSC 00066 000 00000
   VCID: E680FC83D149830E47-80B2

1 Fault Found:
01304 - Radio 
            004 - No Signal/Communication
             Freeze Frame:
                    Fault Status: 01100100
                    Fault Priority: 2
                    Fault Frequency: 1
                    Reset counter: 231
                    Mileage: 278642 km
                    Time Indication: 0
                    Date: 2010.03.11
                    Time: 19:59:08


-------------------------------------------------------------------------------
Address 1C: Position Sensing        Labels: 1Kx-919-xxx-1C.lbl
   Part No SW: 1K5 919 965 D    HW: 1K5 919 965 D
   Component: Kompass         001 0001  
   Revision: 00001000    Serial number: 1293324T49GH05
   Coding: 0000004
   Shop #: WSC 00066 000 00000
   VCID: BC347EEBFF45E9DEC1-80E8

No fault code found.

-------------------------------------------------------------------------------
Address 25: Immobilizer (J334)       Labels: 5K0-920-xxx-25.clb
   Part No SW: 5M0 920 970 C    HW: 5M0 920 970 C
   Component: IMMO          H08 0021  
   Revision: V0008011    Serial number:               
   Shop #: WSC 00000 000 00000
   ASAM Dataset: EV_ImmoUDSMM9RM10 A01010
   ROD: EV_ImmoUDSMM9RM10_SE25.rod
   VCID: B02C5ADBEB0D1DBE6D-80E4

No fault code found.

-------------------------------------------------------------------------------
Address 42: Door Elect, Driver        Labels: 1K0-959-701-MIN3.lbl
   Part No SW: 1K0 959 701 AC    HW: 1K0 959 793 N
   Component: J386  TUER-SG FT    1519  
   Revision: 72009005    Serial number: 00000529098720
   Coding: 0001205
   Shop #: WSC 00066 000 00000
   VCID: EFAE99A7FEB3424634-80BA

No fault code found.

-------------------------------------------------------------------------------
Address 44: Steering Assist        Labels: 1Kx-909-14x-44.clb
   Part No: 1K0 909 144 H
   Component: EPS_ZFLS Kl. 70     2901  
   Revision: 00H15000    
   Shop #: WSC 02069 000 90108
   VCID: AF2E59A73E33024674-80FA

No fault code found.

-------------------------------------------------------------------------------
Address 52: Door Elect, Pass.        Labels: 1K0-959-702-MIN3.lbl
   Part No SW: 1K0 959 702 AC    HW: 1K0 959 792 N
   Component: J387  TUER-SG BT    1519  
   Revision: 72009005    Serial number: 09042415053902
   Coding: 0001204
   Shop #: WSC 00066 000 00000
   VCID: F0AC9ADBE38D5DBE2D-80A4

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio
Cannot be reached

-------------------------------------------------------------------------------
Address 62: Door, Rear Left        Labels: 1K0-959-703-GEN3.lbl
   Part No SW: 1K0 959 703 AH    HW: 1K0 959 795 T
   Component: J388   TUER-SG HL   1401  
   Revision: 12006001    Serial number: 00000004069732
   Coding: 0001168
   Shop #: WSC 00066 000 00000
   VCID: F6A0ACC381E9738EF7-80A2

No fault code found.

-------------------------------------------------------------------------------
Address 65: Tire Pressure (J502)       Labels: 1K0-937-08x-65.clb
   Part No SW: 5K0 937 085 C    HW: 5K0 937 085 C
   Component: RDK           008 0817  
   Coding: 018705
   Shop #: WSC 00066 000 00000
   VCID: B32655D7121B26A610-80E6

2 Faults Found:
02214 - Tire Pressure Warning 
            000 -  - 
             Freeze Frame:
                    Fault Status: 01100000
                    Fault Priority: 1
                    Fault Frequency: 1
                    Reset counter: 255
                    Mileage: 278642 km
                    Time Indication: 0
                    Date: 2010.03.11
                    Time: 19:59:02

             Freeze Frame:
                    Text: 3446571798
                    Pressure: 0.00 bar
                    Pressure: 2.40 bar
                    Temperature: 52.4°C
                    Text: 00
                    Speed: 0.0 km/h

01521 - Sensor for Tire Pressure 
            004 - No Signal/Communication
             Freeze Frame:
                    Fault Status: 01100100
                    Fault Priority: 4
                    Fault Frequency: 1
                    Reset counter: 255
                    Mileage: 278642 km
                    Time Indication: 0
                    Date: 2010.03.11
                    Time: 19:59:02


-------------------------------------------------------------------------------
Address 72: Door, Rear Right        Labels: 1K0-959-704-GEN3.lbl
   Part No SW: 1K0 959 704 AH    HW: 1K0 959 794 T
   Component: J389   TUER-SG HR   1401  
   Revision: 12006001    Serial number: 00000004157040
   Coding: 0001168
   Shop #: WSC 00066 000 00000
   VCID: F7BEA1C786E30A86EC-80A2

1 Fault Found:
00935 - Electric Window Motor; Rear Right (V27) 
            005 - No or Incorrect Basic Setting / Adaptation
             Freeze Frame:
                    Fault Status: 01100101
                    Fault Priority: 6
                    Fault Frequency: 1
                    Reset counter: 231
                    Mileage: 278642 km
                    Time Indication: 0
                    Date: 2010.03.11
                    Time: 19:59:02


-------------------------------------------------------------------------------
Address 77: Telephone        Labels: 5P0-862-335.lbl
   Part No SW: 1Z0 035 729 C    HW: 1Z0 035 729 C
   Component: FSE_2P8x        H35 0170  
   Revision: 00000000    Serial number: 00000005052560
   Coding: 0011070
   Shop #: WSC 00066 000 00000
   VCID: B83C62FBCB7DC5FE25-80EC

1 Fault Found:
01304 - Radio 
            004 - No Signal/Communication
             Freeze Frame:
                    Fault Status: 01100100
                    Fault Priority: 5
                    Fault Frequency: 1
                    Reset counter: 231
                    Mileage: 278642 km
                    Time Indication: 0
                    Date: 2010.03.11
                    Time: 19:59:02


End-------------------------(Elapsed Time: 02:20)--------------------------
 
   #11  

Dana

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The original part numbers are critical when attempting to sort any discrepancies ... but we have to trust the parts catalog if they aren't available. As far as I can tell this vehicle uses two 076-906-051-B sensors. Providing you plugged a pair of dealer sourced B sensors into the harness, performed the reset per the Wiki and that DTC still returned you may have a wiring or controller issue.
 
   #12  

Dana

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P.S. That EDC is long overdue for the latest software .. but I don't know if US dealers can flash them the latest (9971) software level per RVU / Recall 23O6 due to the recent drama. I wouldn't expect a software update to correct this pressure sensor issue but I would consider it before replacing the module if this isn't pressure sensor or wiring related.

Address 01: Engine (CJA) Labels: 03L-906-022-CBE.clb
Part No SW: 03L 906 019 CM HW: 03L 906 022 TS
Component: R4 2,0L EDC G000AG 7967
 
   #13  

powerhouse820

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I must have a wiring issue both sensors are new and B sensors, I guess time to start tracing wires. The both get voltage and grounds are good im just unsure of the signal wire with just the key on they get powered up with 5 volt is this normal? (Black wire which I'm pretty sure hours to exhaust flap and ecm)
 
   #15  

powerhouse820

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When I tried doing basic setting on Egr an error occurred can this be the cause
 
   #16  

powerhouse820

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Ok, gentleman. Just did some wire searching. The black signal wire on the g450 is not making it back to the ecm. I'm not going to chase it all night everything else checked out to the ecm except that wire. Simply continuity test. Soon as I find the broken wire I will update and take pictures just I case someone else runs into this.
 
   #17  

Dana

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Excellent! Pictures would be great.

For anyone else reading this later .. I'm pretty sure both pressure sensors (which my splice to additional components but I'm not in a diagram at the moment) are supplied a 5V power, ground and the mentioned signal return.
 
   #19  

powerhouse820

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I'm pretty sure the signal goes through a 11 pin connector d111 and then to the ecm along with the exhaust flap
 
   #20  

powerhouse820

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What do You mean my overlay and don't forget to check under the head?
 
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