Troublesome q7...timing chain or ECM or something else?

[TheEdge]

Hello all,

New member here, hoping I can get some advice from the experts!

I have a 2007 Q7 Premium 4.2 v8. Had a lot of misfiring problems and replaced the cam sensors a few months back, to no difference. I have VCDS and have been using scans to deduce where to look next. It was leaking oil like crazy, so I decided to spend a couple of days tackling all the potential leak points. I replaced valve cover gaskets (were leaking oil into spark plug wells), replaced the oil separator, hose from oil separator to below intake, removed intake manifold, replaced oil filter housing gaskets, intake manifold gaskets, and spark plugs. Put it all together and did the throttle body adaptation. Valves had a bit of carbon, but weren't really gummed up in any way. The engine now seems to be much smoother at speed, but it's misfiring like crazy at idle. After putting things together and scanning again, I now have an over-advanced camshaft, bank 1 code and still have misfires. I have had an increasing number of ECM codes on various modules over the last few months and after the work I did, i think a few more popped up. Below is the last scan. I'm guessing at the possibility of more than one thing and wondering....maybe I have a broken chain guide and the camshaft jumped a sprocket.....and/or electrical grounds issues........and/or failing ECM. Any thoughts?

Neil

Address 01: Engine Labels:. 079-907-560-BAR.clb
Part No SW: 4L0 910 560 C HW: 4L0 907 560 A
Component: 4.2l V8/4V 0060
Revision: --H16--- Serial number:
Coding: 01210009190F0560
Shop #: WSC 53150 001 1048576
VCID: 2809FCCCEEF00BDBE73-807C
2 Faults Found:
000022 - Bank 1: CMP Sensor (G40) / Engine Speed Sensor (G28)
P0016 - 001 - Incorrect Correlation - Intermittent - MIL ON
Freeze Frame:
Fault Status: 10100001
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 205459 km
Time Indication: 0
Date: 2021.08.06
Time: 18:58:31
Freeze Frame:
RPM: 662 /min
Load: 39.6 %
Speed: 0.0 km/h
Temperature: 44.0°C
Temperature: 28.0°C
Absolute Pres.: 920.0 mbar
Voltage: 13.716 V
000017 - Bank 1: Camshaft A (Intake)
P0011 - 004 - Retard Setpoint not Reached (Over-Advanced)
Freeze Frame:
Fault Status: 01100100
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 205480 km
Time Indication: 0
Date: 2021.08.07
Time: 11:38:15
Freeze Frame:
RPM: 2294 /min
Load: 35.3 %
Speed: 105.0 km/h
Temperature: 98.0°C
Temperature: 33.0°C
Absolute Pres.: 940.0 mbar
Voltage: 13.970 V
Readiness: 0010 1100

-------------------------------------------------------------------------------
Address 02: Auto Trans Labels: 09D-927-750.clb
Part No SW: 09D 927 750 BR HW: 09D 927 750 BR
Component: AL 750 6A 0915
Revision: 00H49000 Serial number:
Coding: 0000504
Shop #: WSC 31414 790 00001
VCID: 7F5B07905BFE6C63F69-802A
1 Fault Found:
01314 - Engine Control Module
008 - Implausible Signal - Intermittent
Freeze Frame:
Fault Status: 00101000
Fault Priority: 2
Fault Frequency: 30
Reset counter: 37
Mileage: 0 km
Time Indication: 0
Date: 2005.09.20
Time: 12:00:00

Address 03: ABS Brakes Labels:. 4L0-910-517-V1.clb
Part No SW: 4L0 910 517 E HW: 4L0 614 517 E
Component: ESP ALLRAD MK25E1 0140
Revision: 00H45001
Coding: 0021553
Shop #: WSC 31414 790 00001
VCID: 2C0100DCFA0827FB03B-8078
1 Fault Found:
01314 - Engine Control Module
004 - No Signal/Communication - Intermittent
Freeze Frame:
Fault Status: 00100100
Fault Priority: 2
Fault Frequency: 1
Reset counter: 185
Mileage: 205451 km
Time Indication: 0
Date: 2021.08.06
Time: 13:10:36
Freeze Frame:
Count: 64
Count: 5121
Count: 8194
Count: 42496

Address 17: Instruments Labels: 4L0-910-xxx-17.lbl
Part No SW: 4F0 910 900 C HW: 4L0 920 900 A
Component: KOMBIINSTR. M73 H11 0070
Revision: 00000000 Serial number: 4ZM35N836
Coding: 2673350
Shop #: WSC 54064 067 57207
VCID: 2019E4EC86C0F39BAF3-8074
1 Fault Found:
01314 - Engine Control Module
004 - No Signal/Communication - Intermittent
Freeze Frame:
Fault Status: 00100100
Fault Priority: 2
Fault Frequency: 1
Reset counter: 185
Mileage: 205451 km
Time Indication: 0
Date: 2021.08.06

Address 19: CAN Gateway Labels:. 4L0-910-468.clb
Part No SW: 4L0 910 468 HW: 4L0 907 468 A
Component: J533__Gateway H06 0040
Revision: 00H06000 Serial number: 0800D063128136
Coding: F7F7FE7F345A06
Shop #: WSC 11111 123 12345
VCID: 6C81C0DC3A88E7FB43B-8038
3 Faults Found:
00473 - Control Module for Elect. Park/Hand Brake (J540)
004 - No Signal/Communication
Freeze Frame:
Fault Status: 01100100
Fault Priority: 3
Fault Frequency: 1
Reset counter: 141
Mileage: 205418 km
Time Indication: 0
Date: 2021.08.02
Time: 00:31:33
02095 - Component Protection Active
000 - - - Intermittent
Freeze Frame:
Fault Status: 00100000
Fault Priority: 1
Fault Frequency: 1
Reset counter: 181
Mileage: 205418 km
Time Indication: 0
Date: 2021.08.02
Time: 00:31:34
01314 - Engine Control Module
004 - No Signal/Communication - Intermittent
Freeze Frame:
Fault Status: 00100100
Fault Priority: 2
Fault Frequency: 1
Reset counter: 185
Mileage: 205451 km
Time Indication: 0
Date: 2021.08.06

Address 34: Level Control Labels: 4L0-910-553.lbl
Part No SW: 4L0 910 553 A HW: 4L0 907 553
Component: LUFTFDR.-CDC H03 7470
Revision: --H03001 Serial number: 15.1528-0082.2
Coding: 0015520
Shop #: WSC 91450 444 70092
VCID: 2809FCCCEEF00BDBE73-807C
4 Faults Found:
02250 - Function Deactivation; Valve Duty Cycle
001 - Upper Limit Exceeded - Intermittent
Freeze Frame:
Fault Status: 00100001
Fault Priority: 6
Fault Frequency: 1
Reset counter: 182
Mileage: 205423 km
Time Indication: 0
Date: 2021.08.03
Time: 18:49:38
Freeze Frame:
Error Code: 46
01400 - Suspension Level Control
001 - Upper Limit Exceeded - Intermittent
Freeze Frame:
Fault Status: 00100001
Fault Priority: 2
Fault Frequency: 3
Reset counter: 184
Mileage: 205424 km
Time Indication: 0
Date: 2021.08.03
Time: 18:50:54
Freeze Frame:
Error Code: 66
01577 - Turn-Off due to Over-Temp
001 - Upper Limit Exceeded - Intermittent
Freeze Frame:
Fault Status: 00100001
Fault Priority: 6
Fault Frequency: 3
Reset counter: 185
Mileage: 205437 km
Time Indication: 0
Date: 2021.08.04
Time: 20:31:14
Freeze Frame:
01314 - Engine Control Module
004 - No Signal/Communication - Intermittent
Freeze Frame:
Fault Status: 00100100
Fault Priority: 3
Fault Frequency: 1
Reset counter: 185
Mileage: 205451 km
Time Indication: 0
Date: 2021.08.06
Time: 13:10:36
Freeze Frame:
Error Code: 112

Address 46: Central Conv. Labels:. 4L0-910-289.lbl
Part No SW: 4L0 910 289 D HW: 4L0 907 289 A
Component: Komfortgeraet H05 0020
Revision: 0020 --- Serial number: 01011178130000
Coding: 7633213
Shop #: WSC 53150 001 1048576
VCID: 313F11A8DD2A4A1330D-8064
Subsystem 1 - Part No: 1K0 951 605 C
Component: LIN BACKUP HORN H03 1301
3 Faults Found:
01134 - Alarm Horn (H12)
014 - Defective
Freeze Frame:
Fault Status: 01101110
Fault Priority: 3
Fault Frequency: 254
Reset counter: 148
Mileage: 198108 km
Time Indication: 0
Date: 2020.12.18
Time: 16:46:10
01134 - Alarm Horn (H12)
012 - Electrical Fault in Circuit
Freeze Frame:
Fault Status: 01101110
Fault Priority: 3
Fault Frequency: 254
Reset counter: 148
Mileage: 198108 km
Time Indication: 0
Date: 2020.12.18
Time: 16:46:10
02103 - Control Module 2 for Vehicle Electrical System (J520)
013 - Check DTC Memory
Freeze Frame:
Fault Status: 01101101
Fault Priority: 3
Fault Frequency: 254
Reset counter: 148
Mileage: 134404 km
Time Indication: 0
Date: 2015.06.12

Address 4F: Centr. Electr. II Labels: 4F0-910-280.lbl
Part No SW: 4F0 910 280 HW: 4F0 907 280 B
Component: ILM Beifahrer H10 0080
Revision: Serial number: 00000000020178
Coding: 0002001
Shop #: WSC 31414 790 00001
VCID: 5EE59A14FC34856BDDF-800A
1 Fault Found:
01314 - Engine Control Module
004 - No Signal/Communication - Intermittent
Freeze Frame:
Fault Status: 00100100
Fault Priority: 3
Fault Frequency: 1
Reset counter: 185
Mileage: 205448 km
Time Indication: 0
Date: 2021.08.06
Time: 13:10:00
Freeze Frame:
Voltage: 11.700 V
Temperature: 33.0°C

Address 61: Battery Regul. Labels: 4F0-910-181.lbl
Part No SW: 4L0 910 181 HW: 4L0 915 181
Component: J0644 BEM H12 0530
Revision: -------- Serial number: 00000000006593
Shop #: WSC 30291 210 01865
VCID: 6491A8FCD258AFBB0BB-8030
Subsystem 1 - Part No: 7P0 915 105 C
Component: von JCB 2A1104E0YU
Coding: 37503039313531303543204A434232413131303445305955
Shop #: WSC 30291 210 01865
1 Fault Found:
03041 - Energy Management Active
000 - - - Intermittent
Freeze Frame:
Fault Status: 00100000
Fault Priority: 7
Fault Frequency: 2
Reset counter: 255
Mileage: 205461 km
Time Indication: 0
Date: 2021.08.07

Address 69: Trailer Labels: 4E0-910-383.lbl
Part No SW: 4E0 910 383 C HW: 4E0 907 383 C
Component: ANHAENGERELEKTR 004 0060
Coding: 0001002
Shop #: WSC 00000 000 00000
VCID: 2411E8FC92D8EFBBCBB-8070
1 Fault Found:
01314 - Engine Control Module
004 - No Signal/Communication - Intermittent
Freeze Frame:
Fault Status: 00100100
Fault Priority: 3
Fault Frequency: 3
Reset counter: 176
Mileage: 204064 km
Time Indication: 0
Date: 2021.05.29

[VinnysS4]

So,
I’m very familiar with the 4.2 in the s4 and it’s almost identical to the 4.2 in the q7. The codes you set usually indicate either a broken timing chain guide, the lower left or upper Middle guide(incorrect correlation). The other thing that can cause it is a wallowed out locking hole in the camshaft adjusters. I believe the measuring blocks should be the same tho I’m not sure. If you can look at measuring blocks 91 and 93, it should show your camshaft spec and actual readings. If they are way off from what they are suppose to be, then there is a mechanical problem

If you see no readings, it would be a different problem. There is an awful lot of no-com with ecu codes. Just an observation


Sent from my iPhone using Tapatalk

[TheEdge]

Hey Vinny, thanks for the tip on the measuring blocks. The ECM troubles me….wondering if it’s on its way out…..

[TheEdge]

I have a p0011 code…overadvanced intake camshaft. As per measuring block 91, my Bank 1 intake cam spec is 26 degrees and actual is -15.5. I’m trying to eliminate all possibilities before pulling the engine to look at chains and guides. Does anyone here know about the camshaft vvt solenoid? I’ve swapped the two….no difference. Removed and tested with 12v and clicks as it should. While the engine running, I measure 12v constant at the electrical connector. I know the solenoid needs oil pressure to function. Is there anything I did in replacing the manifold or valve cover gasket that could impede oil flow to the solenoid? Any other potential issues that could impede the flow of oil to the solenoid on one bank?

[wego0002]

Hello Neil,

you are up for some real expensive fun (approx. 5k total). Just look at the pictures then you understand what I am talking about.

https://photos.app.goo.gl/hr1vFjUYE8qFMjGV2



Your timing chain system is gone and needs urgent replacement, otherwise total engine failure.

Feel free to contact me for advise.

Ciao

Werner