jeffkruse

I have had my 2004 Audi A8 for a little over a month now and the past few days the EPC light (yellow triangle) comes on every once in a while, not every day but sometimes will come on. I will turn off the car and go in the store and the light will be off. Then might stay off for a few days and the smae thing will happen. Any ideas?

Mister Bally

Are you sure it isn't the ESP warning light? EPC just lights up large "EPC" letters on my '04. When "EPC" is lit, the electronic power control (Throttle-by-wire) goes into limp home mode. Either half acceleration and top speed of only about 75 MPH or just a constant 1500 RPM.

If it is the Esp "triangle"; Read the sticky at the top of the D3 threads and heed it's advice. You will be able to figure out the defective part that costs less than twenty bucks (In the USA, but we don't know where you reside) that is the likely problem.

Labor to install is a couple of hours if it is your first time replacing.

MP4.2+6.0

+1 ====> Need a current scan.

jeffkruse

Mister Bally, sorry, you are correct it is just the warning light. Does not display "EPC". I have a Ross Tech diagnositic tool coming, just not here yet. I have 2 Audi's I am going to try and start fixing these things myself. Thanks for all your help guys.

mishar

Once you have that scan post it here. You will need some help with it. At least in the beginning.

Mister Bally

I'll say it now; Based on the erratic light indication, with 85% confidence; your brake light switch is the culprit.

TSHong

+1 The usual suspect with a epc light.

jeffkruse

OK finally receive my diagnostic tool and ran a complete module scan adn was disappointed by all the codes that came back ugh...... But related to this issue with the Air Bag light here are my results. Any suggestions, I am a novice at this stuff, but willing to learn. Because of the suggestions it could be the Brake Light I am including the ABS and Air bags. Thanks in advance for all the help.


Address 03: ABS Brakes Labels: 4E0-910-517.lbl
Part No SW: 4E0 910 517 A HW: 4E0 614 517 A
Component: ESP 5.7 allrad H29 0420
Coding: 0007597
Shop #: WSC 02313 000 00000
VCID: 2149030FF83C3116BBD-8074

1 Fault Found:
00526 - Brake Light Switch-F
011 - Open Circuit - Intermittent
Address 15: Airbags Labels: 4E0-910-655-84.lbl
Part No SW: 4E0 910 655 A HW: 4E0 959 655 E
Component: Airbag 8.4E+ H10 0920
Coding: 0530707
Shop #: WSC 02313 785 00200
VCID: 24470A1BE72E243ED0B-8071

1 Fault Found:
01217 - Side Airbag Igniter; Driver Side (N199)
001 - Upper Limit Exceeded - Intermittent - MIL ON

mishar

Here it is:

Address 03: ABS Brakes Labels: 4E0-910-517.lbl
Part No SW: 4E0 910 517 A HW: 4E0 614 517 A
Component: ESP 5.7 allrad H29 0420
Coding: 0007597
Shop #: WSC 02313 000 00000
VCID: 2149030FF83C3116BBD-8074

1 Fault Found:
00526 - Brake Light Switch-F
011 - Open Circuit - Intermittent
Address 15: Airbags Labels: 4E0-910-655-84.lbl
Part No SW: 4E0 910 655 A HW: 4E0 959 655 E
Component: Airbag 8.4E+ H10 0920
Coding: 0530707
Shop #: WSC 02313 785 00200
VCID: 24470A1BE72E243ED0B-8071

jeffkruse

So that would address this issue too. Thanks for all your help

Address 15: Airbags Labels: 4E0-910-655-84.lbl
Part No SW: 4E0 910 655 A HW: 4E0 959 655 E
Component: Airbag 8.4E+ H10 0920
Coding: 0530707
Shop #: WSC 02313 785 00200
VCID: 24470A1BE72E243ED0B-8071

1 Fault Found:
01217 - Side Airbag Igniter; Driver Side (N199)
001 - Upper Limit Exceeded - Intermittent - MIL ON