Diagnosing fuel pressure problem in Audi Q7 - P2294 code

   #1  

dsnads

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Hi, I am diagnose a fuel pressure problem in 2009 3.6L Gas Audi Q7.

The car starts and runs but has a lot less power than normal. and the P2294 code triggers the check engine light.
Occasionally I also get codes that show random misfires in the cylinders.

I have run the car with the VCDS connected and in the Engine section looked at Groups 103, 140 and 141.
Below is a link to a screenshot with the car running:

http://imgur.com/J62lg6o

My understanding is that the spec for the high pressure is between 25 bar and over 100 bar.
On my car it varies between 6.4 and 6.9 bar, but never goes higher than that. The first 2 fields in Group 141 are at a value of 0.
I have replaced both the fuel sensor on the fuel rail (high pressure) and also the fuel sensor near the firewall and above the HPFP (low pressure).

Is there a way to be absolutely sure what is causing this problem? I have read that sometimes the HPFP needs to be completely replaced as does the cam follower.
But I am reluctant to do that without a certain diagnosis, since it will be over $1000 to do.
 
   #2  

Jack@European_Parts

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Please post a complete auto-scan........
I would measure lift pump PSI and volume first seeing that it is properly regulated.

Visual inspection of HPP cam follower is always advised and costs time to inspect which is cheap.
 
   #3  

dsnads

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Please post a complete auto-scan........
I would measure lift pump PSI and volume first seeing that it is properly regulated.

Visual inspection of HPP cam follower is always advised and costs time to inspect which is cheap.
Thank you Jack. Here is the complete Auto-Scan as you asked (hope ok to post right here) -

Code:
Thursday,30,July,2015,12:44:56:61551
VCDS -- Windows Based VAG/VAS Emulator
VCDS Version: 14.10.2.0
Data version: 20150311
[url]www.Ross-Tech.com[/url]


VIN: WA1AY74L49D004238   License Plate: AUDI Q7
Mileage: 108540km-67443mi   Repair Order: 



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


Chassis Type: 4L (4F0)
Scan: 01 02 03 05 07 08 09 0E 0F 15 16 17 19 1E 36 37 42 46 47 4F
          52 56 62 65 6C 6D 6F 72 76 77

VIN: WA1AY74L49D004238   Mileage: 108540km-67443miles

01-Engine -- Status: Malfunction 0010
02-Auto Trans -- Status: OK 0000
03-ABS Brakes -- Status: OK 0000
04-Steering Angle -- Status: OK 0000
05-Acc/Start Auth. -- Status: OK 0000
07-Control Head -- Status: OK 0000
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: OK 0000
0E-Media Player 1 -- Status: OK 0000
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
1E-Media Player 2 -- Status: OK 0000
36-Seat Mem. Drvr -- Status: OK 0000
37-Navigation -- Status: OK 0000
42-Door Elect, Driver -- Status: OK 0000
46-Central Conv. -- Status: OK 0000
47-Sound System -- Status: OK 0000
4F-Centr. Electr. II -- Status: OK 0000
52-Door Elect, Pass. -- Status: OK 0000
56-Radio -- Status: OK 0000
62-Door, Rear Left -- Status: OK 0000
65-Tire Pressure -- Status: OK 0000
6C-Back-up Cam. -- Status: OK 0000
6D-Trunk Elect. -- Status: OK 0000
6F-Centr. Conv. II -- Status: OK 0000
72-Door, Rear Right -- Status: OK 0000
76-Park Assist -- Status: OK 0000
77-Telephone -- Status: OK 0000
 
-------------------------------------------------------------------------------
Address 01: Engine (BHK)       Labels: 03H-906-032-BLV.lbl
   Part No SW: 03H 906 032 DA    HW: 03H 906 032 G
   Component: Q7 3.6-FSI-LEV2 G   3234  
   Revision: 5CH05---    Serial number:               
   Coding: 0001175
   Shop #: WSC 31414 790 00001
   VCID: 64C76CF3A7ABD001EA7-8031

1 Fault Found:
008852 - Fuel Pressure Regulator Valve (N276) 
               P2294 - 004 - Open Circuit - Intermittent - MIL ON
             Freeze Frame:
                    Fault Status: 10100100
                    Fault Priority: 0
                    Fault Frequency: 6
                    Reset counter: 255
                    Mileage: 108540 km
                    Time Indication: 0
                    Date: 2015.07.30
                    Time: 07:04:22

             Freeze Frame:
                    RPM: 690 /min
                    Load: 29.0 %
                    Speed: 0.0 km/h
                    Temperature: 69.0°C
                    Temperature: 30.0°C
                    Absolute Pres.: 1000.0 mbar
                    Voltage: 14.224 V

Readiness: 0010 0101

-------------------------------------------------------------------------------
Address 02: Auto Trans        Labels: 09E-927-156.lbl
   Part No SW: 4L0 910 156 E    HW: 0AT 927 156 
   Component: AG6 0AT 3,6 FSI USA 0020  
   Revision: --H04---    Serial number:        4044598
   Coding: 0000002
   Shop #: WSC 31414 790 00001
   VCID: 2B55C7CF8AF55F79EBD-807E

No fault code found.

-------------------------------------------------------------------------------
Address 03: ABS Brakes        Labels: 4L0-910-517-V2.clb
   Part No SW: 4L0 910 517 B    HW: 4L0 614 517 D
   Component: ESP ALLRAD MK25E1   0010  
   Revision: 00H30001    
   Coding: 0099345
   Shop #: WSC 31414 790 00001
   VCID: 29593DC780094D69191-807C

No fault code found.

-------------------------------------------------------------------------------
Address 05: Acc/Start Auth.        Labels: 4F0-910-852.clb
   Part No SW: 4F0 910 852 B    HW: 4F0 905 852 D
   Component: FBSAUDIC6 ELV   H05 0090  
   Revision: 00H05000    Serial number: 10602401090978
   Coding: 0000131
   Shop #: WSC 01126 444 100627
   VCID: 254131F7EC1169093D9-8070

   Subsystem 1 - Part No: 4F0 910 132 J
   Component: FBSAUDIC6 EZS   H03 0020

   Subsystem 2 - Part No: 4F0 910 220 A
   Component: FBSAUDIC6 IDG   H01 0040

No fault code found.

-------------------------------------------------------------------------------
Address 07: Control Head        Labels: 4L0-910-7xx-07-H.lbl
   Part No SW: 4L0 910 732 R    HW: 4E0 035 729 A
   Component: Interfacebox    H43 4610  
   Revision: 00000000    Serial number: 354FN087540900
   Coding: 0002003
   Shop #: WSC 31414 790 00001
   VCID: 387FE8834BA3E4E196F-806D

   Subsystem 1 - Part No: 4L0 910 609 
   Component: E0380 BedienteilH01 0060

   Subsystem 2 - Serial number: 00000001082363

   Subsystem 3 - Serial number: 0127.05.080000000100010505ÿ

   Subsystem 4 - Serial number: 010505ÿ

No fault code found.

-------------------------------------------------------------------------------
Address 08: Auto HVAC        Labels: None
   Part No SW: 4L0 910 043 B    HW: 4L0 820 043 L
   Component: KLIMABETAETIGUNGH07 0040  
   Revision: 00---013    Serial number: 00000030096878
   Coding: 0524326
   Shop #: WSC 31414 790 00001
   VCID: 23452FEFE225973953D-8076

No fault code found.

-------------------------------------------------------------------------------
Address 09: Cent. Elect.        Labels: 4F0-910-279.lbl
   Part No SW: 4F0 910 279 N    HW: 4F0 907 279 
   Component: ILM Fahrer      H21 0310  
   Revision: 00000000    Serial number: 4F0907279     
   Coding: 0010123
   Shop #: WSC 08216 444 04789
   VCID: 3467DCB357CB0081BA7-8061

   Subsystem 1 - Part No: 4L1 910 113   Labels: 1KX-955-119.CLB
   Component: Wischer AU716   H15 0100  
   Coding: 00064792
   Shop #: WSC 08216  

   Subsystem 2 - Part No: 8K0 910 557   Labels: 8K0-955-559.CLB
   Component: REGENLICHTSENSORH04 0003  
   Coding: 00150059
   Shop #: WSC 08216  

No fault code found.

-------------------------------------------------------------------------------
Address 0E: Media Player 1        Labels: 4E0-910-111.lbl
   Part No SW: 4L0 910 110 B    HW: 4L0 035 110 
   Component: MP3-Changer     H45 0390  
   Revision: 00045002    Serial number: AUZ5ZBH8447362
   Shop #: WSC 00000 000 00000
   VCID: 1E331E1BC947BAD17C3-804B

No fault code found.

-------------------------------------------------------------------------------
Address 0F: Digital Radio        Labels: 4E0-910-593-SIR.lbl
   Part No SW: 4E0 910 593 M    HW: 4E0 035 593 F
   Component: SDAR SIRIUS     H07 0160  
   Revision: 00000000    Serial number: AUZ4Z7H0330933
   Coding: 0000100
   Shop #: WSC 31414 790 00001
   VCID: 3169D5A7A8D935A9D11-8064

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags        Labels: 4L0-910-655.lbl
   Part No SW: 4L0 910 655 A    HW: 4L0 959 655 B
   Component: 73 AIRBAG AUDI8RH43 0230  
   Revision: 07H43000    Serial number: 0038QD090CTE  
   Coding: 0014131
   Shop #: WSC 31414 790 00001
   VCID: 2B55C7CF8AF55F79EBD-807E

   Subsystem 1 - Part No: 4L0 910 339 A
   Component: BF-Gewichtsens. H03 0030

   Subsystem 2 - Serial number: 6332QSME7116274DG

   Subsystem 3 - Serial number: 6342QSME71147A3FO

   Subsystem 4 - Serial number: 6352QSME6A720E05L

   Subsystem 5 - Serial number: 6362QSME71782747L

   Subsystem 6 - Serial number: 63734SME670D29331

   Subsystem 7 - Serial number: 63834SME66132251S

No fault code found.

-------------------------------------------------------------------------------
Address 16: Steering wheel        Labels: 4F0-910-549.lbl
   Part No SW: 4F0 910 549 A    HW: 4F0 953 549 D
   Component: J0527               0410  
   Revision: 00H03000    Serial number: 90055081420197
   Coding: 0002042
   Shop #: WSC 31414 790 00001
   VCID: 275D3BFF961D7B190F5-8072

   Subsystem 1 - Part No: XXXXXXXXXXX 
   Component: E0221           H02 0030

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments (J285)       Labels: 4L0-920-xxx-17.clb
   Part No SW: 4L0 920 981 S    HW: 4L0 920 981 S
   Component: KOMBIINSTR.   H06 0131  
   Revision: 00000000    Serial number: 8NJ212468     
   Coding: 8B9663040100D705020201
   Shop #: WSC 31414 790 00001
   VCID: 408F8063D373AC212EF-8015

2 Faults Found:
00003 - Control Module 
            005 - No or Incorrect Basic Setting / Adaptation
             Freeze Frame:
                    Fault Status: 01100101
                    Fault Priority: 6
                    Fault Frequency: 1
                    Reset counter: 84
                    Mileage: 57214 km
                    Time Indication: 0
                    Date: 2012.10.29
                    Time: 13:43:30

00438 - Fuel Supply Sensor 2 (G169) 
            010 - Open or Short to Plus - Intermittent
             Freeze Frame:
                    Fault Status: 00101010
                    Fault Priority: 7
                    Fault Frequency: 1
                    Reset counter: 23
                    Mileage: 107677 km
                    Time Indication: 0
                    Date: 2015.06.28
                    Time: 12:33:14


-------------------------------------------------------------------------------
Address 19: CAN Gateway (J533)       Labels: 4F0-907-468.clb
   Part No SW: 4F0 907 468 F    HW: 4F0 907 468 F
   Component: GW-BEM 4CAN-M H06 0022  
   Revision: LA602018    Serial number: 1800L0852580BF
   Coding: 000003
   Shop #: WSC 31414 790 00001
   VCID: 326BDAAB6DDF0EB1A8B-8067

   Subsystem 1 - Part No SW: 8K0 915 181 D    HW: 8K0 915 181 D
   Component: J367-BDM  H06 0080 

No fault code found.

-------------------------------------------------------------------------------
Address 1E: Media Player 2 (R199)       Labels: 4E0-035-785.lbl
   Part No SW: 4E0 035 785 F    HW: 4E0 035 785 C
   Component: SG ext.Player H15 0850  
   Revision: 00000000    
   Coding: 010000
   Shop #: WSC 00000 000 00000
   VCID: 2B55C7CF4AF55F79EBD-807E

No fault code found.

-------------------------------------------------------------------------------
Address 36: Seat Mem. Drvr (J136)       Labels: None
   Part No SW: 4F0 959 760 C    HW: 4F0 959 760 C
   Component: MEM-FS        H08 0062  
   Revision: AA000000    Serial number: 00001001094813
   Coding: 00581300000011110000
   Shop #: WSC 31414 790 00001
   VCID: 3169D5A768D935A9D11-8064

No fault code found.

-------------------------------------------------------------------------------
Address 37: Navigation        Labels: 4E0-910-88x-37.lbl
   Part No SW: 4E0 910 888 M    HW: 4E0 919 887 M
   Component: MNS US          H51 1100  
   Revision: 00000000    Serial number: 313EL087539212
   Shop #: WSC 31414 790 00001
   VCID: 387FE8834BA3E4E196F-806D

No fault code found.

-------------------------------------------------------------------------------
Address 42: Door Elect, Driver (J386)       Labels: 4F0-959-793.clb
   Part No SW: 4F0 959 793 R    HW: 8K0 959 793 D
   Component: TSG FA        H11 0250  
   Revision:             Serial number: 0000100037039 
   Coding: 010D07205E40440004
   Shop #: WSC 31414 790 00001
   VCID: 4683967BF1578211143-8013

No fault code found.

-------------------------------------------------------------------------------
Address 46: Central Conv.        Labels: 4L0-910-289.lbl
   Part No SW: 4L0 910 289 F    HW: 4L0 907 289 C
   Component: Komfortgeraet   H08 0060  
   Revision: 0060 ---    Serial number: 01119150460000
   Coding: 7632925
   Shop #: WSC 31414 790 00001
   VCID: 3365DFAF52C507B9A3D-8066

   Subsystem 1 - Part No: 1K0 951 605 C
   Component: LIN BACKUP HORN H03 1301

No fault code found.

-------------------------------------------------------------------------------
Address 47: Sound System        Labels: 4L0-910-223-BO.lbl
   Part No SW: 4L0 910 223 G    HW: 4L0 035 223 D
   Component: DSP-High AU716  H03 0150  
   Revision: PROD_01     Serial number: 00000000066627
   Coding: 0000016
   Shop #: WSC 31414 790 00001
   VCID: 285F38C39B03746106F-807D

No fault code found.

-------------------------------------------------------------------------------
Address 4F: Centr. Electr. II        Labels: 4F0-910-280.lbl
   Part No SW: 4F0 910 280     HW: 4F0 907 280 D
   Component: ILM Beifahrer   H12 0100  
   Revision:             Serial number: 00000000037107
   Coding: 0012001
   Shop #: WSC 31414 790 00001
   VCID: 5EB35E1B89C7FAD13C3-800B

No fault code found.

-------------------------------------------------------------------------------
Address 52: Door Elect, Pass. (J387)       Labels: 4F0-959-792.clb
   Part No SW: 4F0 959 792 R    HW: 8K0 959 792 D
   Component: TSG BF        H11 0250  
   Revision:             Serial number: 0000100037236 
   Coding: 010D07205E40440004
   Shop #: WSC 31414 790 00001
   VCID: 45819177CC5189091D9-8010

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio        Labels: 4E0-910-541.lbl
   Part No SW: 4E0 910 541 T    HW: 4E0 035 542 
   Component: TUNER EU/US/RDW H42 0630  
   Revision: 00000000    Serial number: 304EL087622921
   Coding: 0000002
   Shop #: WSC 31414 790 00001
   VCID: 3169D5A7A8D935A9D11-8064

No fault code found.

-------------------------------------------------------------------------------
Address 62: Door, Rear Left (J388)       Labels: 4F0-959-795.clb
   Part No SW: 4F0 959 795 M    HW: 8K0 959 795 B
   Component: TSG HL        H10 0251  
   Revision:             Serial number: 0000100035151 
   Coding: 010C07204040230004
   Shop #: WSC 31414 790 00001
   VCID: 43858F6FC265B73933D-8016

No fault code found.

-------------------------------------------------------------------------------
Address 65: Tire Pressure        Labels: 4F0-910-273-BA.lbl
   Part No SW: 4F0 910 273 B    HW: 4F0 907 273 A
   Component: Reifendruck 3   H05 0100  
   Revision: 00050100    Serial number: 00000900074914
   Coding: 0062424
   Shop #: WSC 31414 790 00001
   VCID: 224B2AEBFD3F9E3158B-8077

No fault code found.

-------------------------------------------------------------------------------
Address 6C: Back-up Cam.        Labels: 4L0-910-441.clb
   Part No SW: 4L0 910 441 A    HW: 4L0 907 441 A
   Component: J772__Rearview      0050  
   Revision: --H12---    Serial number: 525PA8-J844282
   Coding: 1020101
   Shop #: WSC 31414 790 00001
   VCID: 24472CF3E72B90012A7-8071

No fault code found.

-------------------------------------------------------------------------------
Address 6D: Trunk Elect.        Labels: None
   Part No SW: 4L0 910 945     HW: 4L0 827 851 C
   Component: ValeoHeckdeckel H25 0290  
   Revision: --H25001    Serial number: E5030000B     
   Shop #: WSC 98765 666 38354
   VCID: 6CD704D34F7B9841A27-8039

   Subsystem 1 - Part No: 4L0 910 946 
   Component: ValeoHeckdeckel H25 0290

   Subsystem 2 - Serial number: E5030100B     

   Subsystem 3 - Serial number: RD05.06.08--H25001001C0202ÿ

   Subsystem 4 - Serial number: 1C0202ÿ

No fault code found.

-------------------------------------------------------------------------------
Address 6F: Centr. Conv. II        Labels: 4L0-910-290.lbl
   Part No SW: 4L0 910 290 A    HW: 4L0 907 290 A
   Component: ILM HINTEN 2    H05 0060  
   Revision: AAH05061    Serial number: 003707177-----
   Coding: 0003595
   Shop #: WSC 31414 790 00001
   VCID: 264336FB91176211343-8073

   Subsystem 1 - Part No: 4L0 910 591 
   Component: J_245_EE16_SKB09H10 0200

   Subsystem 2 - Part No: 4L0 910 591 
   Component: J_394_EE16_SKB09H10 0200

   Subsystem 3 - Part No: 4L0 910 591 
   Component: J_392_EE16_SKB09H10 0200

No fault code found.

-------------------------------------------------------------------------------
Address 72: Door, Rear Right (J389)       Labels: 4F0-959-795.clb
   Part No SW: 4F0 959 795 M    HW: 8K0 959 795 B
   Component: TSG HR        H10 0251  
   Revision:             Serial number: 0000100035134 
   Coding: 010C07204040230004
   Shop #: WSC 31414 790 00001
   VCID: 43858F6FC265B73933D-8016

No fault code found.

-------------------------------------------------------------------------------
Address 76: Park Assist        Labels: 4Fx-910-283.lbl
   Part No SW: 4F0 910 283 K    HW: 4F0 919 283 K
   Component: Parkhilfe 8-Kan H12 0100  
   Revision: 00H12000    Serial number: 69820815002347
   Coding: 0221246
   Shop #: WSC 31414 790 00001
   VCID: 2C57C4D38FFB5841E27-8079

No fault code found.

-------------------------------------------------------------------------------
Address 77: Telephone        Labels: 4E0-910-336.lbl
   Part No SW: 4F0 910 336 G    HW: 4E0 862 335 
   Component: Handyvorb2      H20 1120  
   Revision: 00000000    Serial number: 00000005042136
   Coding: 0010900
   Shop #: WSC 31414 790 00001
   VCID: 275D3BFF961D7B190F5-8072

No fault code found.

End-------------------------(Elapsed Time: 03:44)--------------------------
 
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   #4  

Jack@European_Parts

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(N276)

Now this is an open circuit and I would trace the tracks with WD back to controller......Inspect wiring and connector at N 276

FYI These regulator valves fail frequently.........
 
   #5  

Dana

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I agree with Jack here but do make sure that N276 (or N290 in a wiring diagram) isn't getting power from a relay that could be malfunctioning or a spliced connection in the harness. I'm not in a diagram for this vehicle at the moment but most HPFPs are powered by a J757 relay.
 
   #6  

dsnads

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Thank you Jack and Dana for your posts! I am determined to figure this out (famous last words).

Jack,
The wiring is all new looking and wrapped, but I will re-inspect it.
When you say the regulator valves fail regularly do you mean the High Pressure Fuel Pump or a replaceable component of this?

Dana,
Where can I find the J757 relay though on the Q7, any way to help me with that on the WD for this 2009 Q7?

Also, I noticed these faults in the Auto-Scan, do they help us troubleshoot?
Address 17: Instruments (J285) Labels: 4L0-920-xxx-17.clb
Part No SW: 4L0 920 981 S HW: 4L0 920 981 S
Component: KOMBIINSTR. H06 0131
Revision: 00000000 Serial number: 8NJ212468
Coding: 8B9663040100D705020201
Shop #: WSC 31414 790 00001
VCID: 408F8063D373AC212EF-8015

2 Faults Found:
00003 - Control Module
005 - No or Incorrect Basic Setting / Adaptation
Freeze Frame:
Fault Status: 01100101
Fault Priority: 6
Fault Frequency: 1
Reset counter: 84
Mileage: 57214 km
Time Indication: 0
Date: 2012.10.29
Time: 13:43:30

00438 - Fuel Supply Sensor 2 (G169)
010 - Open or Short to Plus - Intermittent
Freeze Frame:
Fault Status: 00101010
Fault Priority: 7
Fault Frequency: 1
Reset counter: 23
Mileage: 107677 km
Time Indication: 0
Date: 2015.06.28
Time: 12:33:14
 
   #7  

Jack@European_Parts

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Most importantly see how the auto-scan displayed this information changing your diagnostic path to take now verse PSI bullshit?

Correct Dana N290 if looking at WD because no N276 exists I see in there.
Looks like maybe Typo maybe in VCDS for BHK or typo in WD.

Looks like D117 to D112 from stargate Track 131/194 splits to Fuse S13 15 amp which must be inspected!
Through aforementioned fuse to stargate 166/196 track to D108 via J757 ( 2/87 )

Now the split aforementioned should also be investigated for stargate 192/192 to V144 Fuel diagnostic pump.

Now for the CURVE ball!!!!!!!!!!
......at fuse S14 via D108 goes to stargate 168/168 and is connected to ( OXS ) Oxygen sensor heater circuits.

It is possible to get a flaky bad OXS heater .............that doesn't blow fuse but causes a disruption to power as brown out for N290 or N276.........
 
   #8  

dsnads

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Hi Jack, thanks again!
Do I need access to the WD to follow your suggestions, if so is there a site online I can look?

I have just now inspected all 4 15A fuses under the plastic cover drivers side firewall area. All these are fine.
See picture what I am referring to:

http://imgur.com/gRjf1sm

Is one of these relays for the HPFP, or do I need to go into the area to the right and unscrew those torx bolts to find it?
Also is there a way to test the right relay?

How can I check or test the OXS heater (curve ball you mentioned)...
 
   #9  

Jack@European_Parts

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You can go to Erwin.

In USA : www.erwin.audiusa.com
World : www.erwin.audi.com

Dude you need to learn to test stuff not just swap parts and take a class.....You must RTFB.
You could, however, unplug the OXS sensors heaters by plug or extract the lead just for them, using WD to see if the N276 DTC goes bye bye.
 
   #10  

dsnads

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Thanks but I don't have Erwin or the Fine Book or the Bentley. Guess I will see how much the subscriptions are.
Not sure I understand your suggestion on the OXS sensor heaters, can you help with a little more handholding...
I tried to remove the fuel pump relay labeled 614 but there must be a trick to that. Pushing the tab isn't working.
Striking out on most everything. Your help is much appreciated.
 
   #11  

Jack@European_Parts

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Okay ok.

No sticky hands though.......

Please unplug the Oxygen sensors and see if symptom for N276 goes away during road test.
 
   #12  

dsnads

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Thanks Jack, I will try that and report back!
 
   #13  

Jack@European_Parts

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Don't forget to clear codes before road test and report back a full auto-scan after road test
 
   #14  

dsnads

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Jack, I have run the car as you said without the oxygen sensors connected, and looks like no change.
Here are the pics of the disconnected sensors and the VCDS screen (2 images):

http://imgur.com/q6Mesti

Below is the new log file (I cleared codes before like you said), please let me know if you have other suggestions to try.
Is it possible I have a bad fuel pump relay, is that worth swapping out with a new one... any other ideas...

Code:
Friday,31,July,2015,11:53:56:61551
VCDS -- Windows Based VAG/VAS Emulator
VCDS Version: 14.10.2.0
Data version: 20150311
[url]www.Ross-Tech.com[/url]


VIN:    License Plate: Q7 NO OXS



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


                Address 01: Engine       Labels: 03H-906-032-BLV.LBL
Control Module Part Number: 03H 906 032 DA    HW: 03H 906 032 G
  Component and/or Version: Q7 3.6-FSI-LEV2 G   3234
           Software Coding: 0001175
            Work Shop Code: WSC 31414 790 00001
                      VCID: 64C76CF3A7ABD001EA7-8031
5 Faults Found:

000054 - Oxygen (Lambda) Sensor B1 S2: Heating Circuit 
               P0036 - 004 - Malfunction / Open Circuit
             Freeze Frame:
                    Fault Status: 01100100
                    Fault Priority: 0
                    Fault Frequency: 1
                    Reset counter: 255
                    Mileage: 108566 km
                    Time Indication: 0
                    Date: 2015.07.31
                    Time: 11:50:55

             Freeze Frame:
                    RPM: 1578 /min
                    Load: 18.4 %
                    Speed: 0.0 km/h
                    Temperature: 69.0°C
                    Temperature: 45.0°C
                    Absolute Pres.: 1000.0 mbar
                    Voltage: 11.938 V

000086 - Oxygen (Lambda) Sensor B2 S2: Heating Circuit 
               P0056 - 004 - Malfunction / Open Circuit
             Freeze Frame:
                    Fault Status: 01100100
                    Fault Priority: 0
                    Fault Frequency: 1
                    Reset counter: 255
                    Mileage: 108566 km
                    Time Indication: 0
                    Date: 2015.07.31
                    Time: 11:50:55

             Freeze Frame:
                    RPM: 1578 /min
                    Load: 18.4 %
                    Speed: 0.0 km/h
                    Temperature: 69.0°C
                    Temperature: 45.0°C
                    Absolute Pres.: 1000.0 mbar
                    Voltage: 11.938 V

000048 - Oxygen (Lambda) Sensor B1 S1: Heating Circuit 
               P0030 - 004 - Malfunction / Open Circuit
             Freeze Frame:
                    Fault Status: 01100100
                    Fault Priority: 0
                    Fault Frequency: 1
                    Reset counter: 255
                    Mileage: 108566 km
                    Time Indication: 0
                    Date: 2015.07.31
                    Time: 11:50:55

             Freeze Frame:
                    RPM: 1578 /min
                    Load: 18.4 %
                    Speed: 0.0 km/h
                    Temperature: 69.0°C
                    Temperature: 45.0°C
                    Absolute Pres.: 1000.0 mbar
                    Voltage: 11.938 V

000080 - Oxygen (Lambda) Sensor B2 S1: Heating Circuit 
               P0050 - 004 - Malfunction / Open Circuit
             Freeze Frame:
                    Fault Status: 01100100
                    Fault Priority: 0
                    Fault Frequency: 1
                    Reset counter: 255
                    Mileage: 108566 km
                    Time Indication: 0
                    Date: 2015.07.31
                    Time: 11:50:55

             Freeze Frame:
                    RPM: 1578 /min
                    Load: 18.4 %
                    Speed: 0.0 km/h
                    Temperature: 69.0°C
                    Temperature: 45.0°C
                    Absolute Pres.: 1000.0 mbar
                    Voltage: 11.938 V

008852 - Fuel Pressure Regulator Valve (N276) 
               P2294 - 004 - Open Circuit
             Freeze Frame:
                    Fault Status: 01100100
                    Fault Priority: 0
                    Fault Frequency: 1
                    Reset counter: 255
                    Mileage: 108566 km
                    Time Indication: 0
                    Date: 2015.07.31
                    Time: 11:50:55

             Freeze Frame:
                    RPM: 1547 /min
                    Load: 14.5 %
                    Speed: 0.0 km/h
                    Temperature: 69.0°C
                    Temperature: 45.0°C
                    Absolute Pres.: 1000.0 mbar
                    Voltage: 11.811 V


Readiness: 0110 0101
 
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   #15  

Jack@European_Parts

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Okay very good......so now why is voltage in the crapper?

Have you verified that the wiring from ECU/supply J757 to N290/N276 is okay with overlay?

Have you changed J757?
 
   #16  

dsnads

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Jack, great catch I assume voltage should be around 13+ with the car running. I have removed and reseated the same fuel pump relay think that is J757. Should I replace that with a new one as a first step? Mine has a 614 on the top.
 
   #18  

dsnads

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Ok thanks but I will need to find a library with these manuals...
 
   #20  

dsnads

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Thanks! Thought I needed a subscription but will try this when I get home...
 
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