The ABS and asr light are continuously lit

MNSUNKISS55

MEMBER
2004 VOLKSWAGEN PASSAT
4 CYL
TURBO
4WD
MANUAL
115,000 MILES

After replacing the Axcel on the front passenger side. The abs and asr light are continuously lit. Im guessing this is just the sensor because I do not notice that the abs or 4 wheel drive is kicking in while running. I am unable to find a video or info online regarding how to disconnect and clean the abs sensor. Wondering if this is the same sensor AKA wheel speed sensor? Any additional info would be much appreciated.

1 Reply

CARADIODOC

MECHANIC
33,871 POSTS

There's going to be a diagnostic fault code related to the cause, but understand those codes never say to replace parts or that they're bad. They only indicate the circuit or system that needs to be diagnosed further, or the unacceptable operating condition. These guides can help us find the problem or code and fix it

https://youtu.be/Pb6nXV-iamI

and

https://youtu.be/rTtAnsOlZU4

and

https://youtu.be/ANWVTh2RQoQ

Please run down these guides and report back.

You can get an idea of the type of problem by watching when the yellow ABS warning light turns on. If it goes through its six-second system test when you turn on the ignition switch, then stays on, suspect an electrical problem like a cut wire to a wheel speed sensor, or something like low brake fluid level. If the light goes off after the system test, and stays off until the car starts moving, you have a mechanical problem that is preventing a speed signal from being generated at one wheel. Given the recent repair, a good suspect would be the replacement shaft doesn't have the tone ring on the outer joint. Another good suspect is the wheel speed sensor got bumped and is broken or too far away from the tone ring to generate a strong signal.