Hey, I just joined this site, and I had a question about some lights that are flashing. I have a 2001.5 s4, and the Abs light is on, and the brake light is flashing, i think this is because of a bad abs module, but im not sure. Does anyone have previous experience with this problem?
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Yup, you need a new/rebuilt ABS module.

 

Also, the ECS light is on as well. Would that be caused by the abs module too?
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your wheel speed sensors could be bad but its probably just the ABS module

 

I have heard that I can get my ABS module rebulit some were for around $300?