isleblue65

EPC light comes on dash when I start the car and stays on now. I cleared the code with Vag-Com and it comes right back on. Happened after pulling stuff out of the way of the valve covers to apply Loctite and re-tighten nuts to fix oil leak. Everything is back together. The only other recent work was replacing left front inner and outer cv boots.

Someone mis-advised me that the EPC followed by that code was related to an incomplete circuit to ABS sensor, so I cut the cable and re-wired it in the wheel well where I was replacing teh cv boots. I did stretch the cable when removing the upper control arms to let the hub move out to get the cv joint out so I thought that made sense. It did not fix the issue.

Ross-Tech states possible causes as:

EPC Warning Lamp (K132) faulty
Wiring/Connectors from/to EPC Warning Lamp (K132) faulty
Engine Control Module faulty

Possible solutions:

Check EPC Warning Lamp (K132)
Check Wiring/Connectors from/to EPC Warning Lamp (K132)
Check Engine Control Module

Where to start???

endre

check with this list:

http://www.bentleypublishers.com/tec....dtc.table.htm

isleblue65

Thanks Endre; that list describes p1676 as:

Drive by Wire-MIL Circ. Electrical Malfunction. Although by the description, this sounds to me like it would have something to do with the electronic throttle control or something, a little searching of forums for this code came up with someone suggesting to check for leaks in the intake system. This reminded me that I did find I had left the PCV connector off of the Y pipe and I drove the car for a day like that. Once the EPC light came on, I looked around and saw that connector off & re-connected. Cleared codes and EPC comes on again. I'll check around for leaks, and build this leak tester:
http://www.awe-tuning.com/media/pdf/...ure_tester.pdf

Any other suggestions?

endre

Check also this info, looks interesting:

http://www.passatworld.com/forums/68...-dash-out.html

endre

Ok,

This is what comes up from a database, check the picture.

endre

This module is the instrument cluster by itself i suppose.

In the picture you can see its location.

isleblue65

Thanks, so according to this, the instrument panel has to come out and the module fixed or replaced. The Passat World forum you linked showed it as a "Power Accelerator Fault". Others indicate it has something to do with the air intake system, and at least one source pointed to the faulty ABS circuit.

I'm confused by the wild, all over the board trouble code descriptions. They could have you tearing apart 5 completely different systems in your car to chase a single trouble code.

It seems like starting with simple checks (intake leaks) and moving toward more complex while following the meandering path of these fault code descriptions and recommendations is the only path toward resolution.

I can pretty much guarantee that if this problem lies deep within the instrument cluster, I'll live with it until I sell the car or the car stops running.

Redneck Truck

You strike me as more of a Jeep guy. Fault code, ergo part must be bad, replace parts until problem solved. I've never heard of anyone splicing the ABS wheel speed sensor wires. Has anyone else? Have you checked for fault codes in other modules? Have you replaced your battery with a known good one? Checked all connections?

isleblue65

Splicing the ABS wires was done out of frustration after 2 weeks of back to back problems with the car. In hindsight, I should have had more patience. No, I would not drive a Chrysler product if it was my only option. And I do know someone who repaired a broken ABS cable that cracked and shorted at the strain relief by splicing in a shielded 4 conductor wire.

Here are the complete fault codes scanned a minute ago. Note that the drivers seat memory has never worked:

VCDS Version: Release 10.6.5
Data version: 20110930
Craig's A6 2.7t
Wednesday,05,October,2011,07:08:46:50532

Chassis Type: 4B - Audi A6 C5
Scan: 01 02 03 06 08 15 16 17 18 22 34 35 36 37 45 55 56 57 65 67
75 76 77

-------------------------------------------------------------------------------
Address 01: Engine Labels: 078-907-551-AZA.lbl
Part No: 4B0 907 551 K
Component: 2.7l V6/5VT G 0005
Coding: 06612
Shop #: WSC 30011
VCID: 2C4A0B08F690

1 Fault Found:
18084 - EPC Warning Lamp (K132) Circuit: Electrical Malfunction
P1676 - 35-00 - -
Readiness: 0000 0001

-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 8E0-614-111-EDS.lbl
Part No: 8E0 614 111 A
Component: ABS/EDS 5.3 QUATTRO D10
Shop #: BB 24334
VCID: 1C2ADBC8A630

No fault code found.

-------------------------------------------------------------------------------
Address 08: Auto HVAC Labels: 4B0-820-043-MY1.lbl
Part No: 4B0 820 043 L
Component: A6-Klimavollautomat D64
Coding: 00160
Shop #: WSC 02325
VCID: 2358E0349B4E

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags Labels: 4B0-959-655-AI8.lbl
Part No: 4B0 959 655 H
Component: Airbag Front+Seite 1002
Coding: 00106
Shop #: WSC 02324
VCID: 357C2E6C25DA

No fault code found.

-------------------------------------------------------------------------------
Address 16: Steering wheel Labels: 4B0-907-487.lbl
Part No: 4B0 907 487 D
Component: Lenkradelektronik D01
Coding: 00103
Shop #: WSC 65535
VCID: 2D4C060CCD8A

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments Labels: 4B0-920-xxx-17.lbl
Part No: 4B0 920 980 MX
Component: C5-KOMBIINSTR. VDO D13
Coding: 02262
Shop #: WSC 19410
VCID: 870014A48FB6

No fault code found.

-------------------------------------------------------------------------------
Address 35: Centr. Locks Labels: 4B0-962-258.lbl
Part No: 4B0 962 258 J
Component: Central Lock/Alarm D33
Coding: 15917
Shop #: WSC 02325
VCID: 30721F78DAB8

3 Faults Found:
01374 - Alarm triggered by Terminal 15
35-00 - -
01370 - Alarm triggered by Interior Monitoring
35-00 - -
01559 - Drivers Door
58-10 - Can't Lock - Intermittent

-------------------------------------------------------------------------------
Address 36: Seat Mem. Drvr Labels: None
Part No: 4B0 959 760 A
Component: Sitzmemory D05
VCID: 2B480814F39E

1 Fault Found:
00668 - Supply Voltage Terminal 30
07-10 - Signal too Low - Intermittent

-------------------------------------------------------------------------------
Address 45: Inter. Monitor Labels: 4B0-951-173.lbl
Part No: 4B0 951 173
Component: Innenraumueberw. D03
Coding: 00001
Shop #: WSC 02325
VCID: E0D22F384AD8

1 Fault Found:
01382 - Alarm triggered by Anti-Theft Sensor; Front Left
35-00 - -

-------------------------------------------------------------------------------
Address 55: Xenon Range Labels: 4B0-907-357-AUT.lbl
Part No: 4B0 907 357
Component: LEUCHTWEITEREGLER D004
Coding: 00006
Shop #: WSC 02325
VCID: E5DC3E2C55FA

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio Labels: 8D0-035-1xx-56.lbl
Part No: 4B0 035 195 A
Component: Radio D00
Coding: 00205
Shop #: WSC 02325
VCID: 1E2ED1C0B02C

No fault code found.

End ---------------------------------------------------------------------

Redneck Truck

You've got two low voltage codes. How old is your battery? Have you swapped in a known good one? Do that, clear codes, and see if the problem returns.