Help please: EPC light on but no error code...

[vlsi54199]

Car: Audi A4 2006, 3.2, manual

The EPC light came on few days ago when I was driving. The problem is it's not always on, you have to drive certain miles every time, then it came on.

I tried to use VAG when the light is on, however, it shows "no code"...

oh, EPC is the only light on, no "check engine"...

Please help....

[Dana @ Ross-Tech]

Did you run an Auto-Scan? Please do, regardless of the EPC light condition and post it here. It's possible that faults are stored in the Trans or ABS modules.

[vlsi54199]

Big thanks, Dana...

here is the code through auto-scan.

1 Fault Found:
001796 - Clutch Switch (F36): Implausible Signal
P0704 - 008 - Implausible Signal
Freeze Frame:
Fault Status: 00101000
Fault Priority: 2
Fault Frequency: 1
Reset counter: 40
Mileage: 88005 km
Time Indication: 0

Freeze Frame:
RPM: 1504 /min
Mass Air / Rev.: 103.6 mg/str
Temperature: 93.0癈
Part Throttle
Load: 18.0 %
Speed: 53.0 km/h

Readiness: 0000 0000

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

Now, the question is - how to fix it

[Dana @ Ross-Tech]

Well, that is stored in the Engine electronics so it should always be there.

EPC is Electronic Pedal Control and faults can set when the brake light switch is faulty, so I guess the same is possible if it thinks someone is riding the clutch. If you need help finding the F36 Measuring blocks, post the complete Auto-Scan so we can see the whole car and what its made of.

[vlsi54199]

Thanks!!

here is the complete code:

Friday,04,June,2010,09:46:30:13314
VCDS Version: Release 908.0
Data version: 20090911



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


Chassis Type: 8E - Audi A4 B6/B7
Scan: 01 02 03 08 09 0F 11 15 16 17 18 36 37 45 46 55 56 57 65 67
69 75 76 77

VIN: WAUDH78E76A293494 Mileage: 88030km/54699miles
-------------------------------------------------------------------------------
Address 01: Engine (AUK) Labels: 06E-910-559-BKH.lbl
Part No SW: 8E0 910 559 HW: 8E0 907 559 A
Component: 3.2l V6 FSI 0060
Revision: --H16--- Serial number:
Coding: 01040109180F0120
Shop #: WSC 06133 444 57453

1 Fault Found:
001796 - Clutch Switch (F36): Implausible Signal
P0704 - 008 - Implausible Signal
Freeze Frame:
Fault Status: 00101000
Fault Priority: 2
Fault Frequency: 1
Reset counter: 40
Mileage: 88005 km
Time Indication: 0

Freeze Frame:
RPM: 1504 /min
Mass Air / Rev.: 103.6 mg/str
Temperature: 93.0癈
Part Throttle
Load: 18.0 %
Speed: 53.0 km/h

Readiness: 0000 0000

-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 8E0-910-517.lbl
Part No SW: 8E0 910 517 J HW: 8E0 614 517 BH
Component: ESP8 quattro H06 0140
Revision: 00000000 Serial number: 00000000000000
Coding: 0004379
Shop #: WSC 06335 000 00000

No fault code found.

-------------------------------------------------------------------------------
Address 08: Auto HVAC Labels: 8E0-820-043.lbl
Part No: 8E0 820 043 BM
Component: A4 Klimaautomat 2833
Coding: 00000
Shop #: WSC 00000

No fault code found.

-------------------------------------------------------------------------------
Address 09: Cent. Elect. Labels: 8E0-907-279-8EC.lbl
Part No: 8E0 907 279 N
Component: int. Lastmodul USA 0907
Coding: 01023
Shop #: WSC 65536

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags Labels: 8E0-959-655-94.lbl
Part No SW: 8E0 959 655 H HW: 8E0 959 655 H
Component: Airbag 9.41 H12 3840
Revision: 91H12384 Serial number: 0036N001TNGF
Coding: 0032607
Shop #: WSC 06335 000 00000

Part No: 8E0 910 339 B
Component: BF-Gewichtsens. 002 0070

No fault code found.

-------------------------------------------------------------------------------
Address 16: Steering wheel Labels: 8E0-953-549.lbl
Part No: 8E0 953 549 R
Component: Lenks醬lenmodul 0501
Coding: 02041
Shop #: WSC 06133

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments Labels: 8E0-920-9xx-8EC.lbl
Part No SW: 8E0 920 982 F HW: 8E0 920 982 F
Component: KOMBI+WFS 4 H14 0110
Revision: 0110 Serial number: 00000000000000
Coding: 0023261
Shop #: WSC 00613 444 53700

No fault code found.

-------------------------------------------------------------------------------
Address 36: Seat Mem. Drvr Labels: 8E0-959-760.lbl
Part No: 8E0 959 760
Component: Sitzmemory R2 F 0305
Coding: 00002
Shop #: WSC 00000

No fault code found.

-------------------------------------------------------------------------------
Address 46: Central Conv. Labels: 8E0-959-433-MAX.lbl
Part No: 8E0 959 433 CG
Component: Komfortger醫 T7B 4035
Coding: 11820
Shop #: WSC 06335

Part No: 8E1959801G
Component: T鮮steuer.FS BRM 0706

Part No: 8E1959802G
Component: T鮮steuer.BF BRM 0706

Part No: 8E0959801E
Component: T鮮steuer.HL BRM 0606

Part No: 8E0959802E
Component: T鮮steuer.HR BRM 0606

No fault code found.

-------------------------------------------------------------------------------
Address 55: Xenon Range Labels: 4F0-910-357.lbl
Part No SW: 4F0 910 357 E HW: 4F0 907 357 E
Component: AFS 1 H01 0010
Revision: 00000001 Serial number:
Coding: 0000019
Shop #: WSC 06335 000 00000

Part No: 8E0 941 329
Component: AFS-Modul links H03 0020

Part No: 8E0 941 329
Component: AFS-Modul rechtsH03 0020

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio Labels: 8E0-035-1xx-56.lbl
Part No: 8E0 035 195 H
Component: symphony II PM6 0460
Coding: 01065
Shop #: WSC 71424

No fault code found.

-------------------------------------------------------------------------------
Address 77: Telephone Labels: 8P0-862-335.lbl
Part No SW: 8P0 862 335 G HW: 8P0 862 335 G
Component: FSE_255x BT H21 0190
Revision: 00000001 Serial number: 00000000440025
Coding: 0001677
Shop #: WSC 09807 444 68371

No fault code found.

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




I found some posts in the forum, it's more related to clutch pedal switch... so I'll check it out tonight.