2003 Audi A6 ABS and Brake Lights On

WWROEMER

MEMBER
2003 AUDI A6
V8
AWD
AUTOMATIC
153,000 MILES

I have a brake fault light along with the ABS light on. The code read said it was the front left ABS sensor gone bad. I had this replaced and the lights were still on. I then read that it was possibly the brake sensor switch behind at the brake pedal. I bought and replaced this part. Lights were off for a short test ride and came back on. Any ideas where to go from here? When th ecar is cold the lights will sometimes stay off for a distance but always come back on.

5 Replies

BMRFIXIT

MECHANIC
19,053 POSTS

ABS light on you should check for codes
what do you have for codes

Before beginning
Check brake system (master cylinder and fluid, brake hoses, brake lines and brake calipers) for function and proper sealing (must be free of leaks).

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Sunday, September 19th, 2010 AT 9:31 PM

WWROEMER

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3 POSTS

The code indicated it was the front left ABS sensor. As I believe I said in the initial post. This sensor was replaced at a cost of over $300. This did not fix it. I then read it possibly is the "brake sensor unit" at the brake pedal. I replaced this part. The lights are still on. The brake fluid is full and there are no leaks.

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Monday, September 20th, 2010 AT 8:36 AM

BMRFIXIT

MECHANIC
19,053 POSTS

I do understand that the repair was done
If have ABS light on that is an indication of trouble and it should set a code
for me to be able to help you I need that code

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Monday, September 20th, 2010 AT 10:57 PM

WWROEMER

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3 POSTS

I assumed it remains the same code which still indicates the front left ABS sensor. I will have it read again.

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Tuesday, September 21st, 2010 AT 7:00 AM

BMRFIXIT

MECHANIC
19,053 POSTS

You have four sensors could go out at any time, you still have wiring and many others to consider
with codes I can pull up a diagnostic charts to follow and locate the defect