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Brake warning and ABS light both on

764 Views 3 Replies 3 Participants Last post by  bestseany
For the last 6 months, I've had a problem with both the brake system and abs warning lights coming on together.

They would come on in the morning on the way in to work, but wouldn't come back on if I turned the engine off for 10 mins or so. The ABS doesn't work when the lights are on, but does work fine when the lights are off.

I think this has been happening since I accidentally put oil in the brake fluid. The oil has since been flushed out but I think that the oil may have damaged the brake fluid sensor in the resevoir.

Would a faulty fluid sensor make the ABS light come on too though? And is there a way I can bypass the sensor to test it? i.e. shorting out the plug for it to see if turns the light off?
1 - 4 of 4 Posts
Oil would have damaged brake servo seals, i would have thought
And possibly the caliper/wheel cylinder seals.
How would that make the ABS light come on?

The oil never really had a chance to get into the braking system as it floats on top of the fluid in the resevoir.
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