abs and asc lights on intermittently

[dmw]

My abs and asc lights come on every other day or so. When I restart the car, they don't come back on. I had the codes checked. It sounds like a ton of different faults were stored. So I assume it is not just a bad sensor. Thoughts?

[CarbonBlkE36]

try checking to see if ur alternator is charging, that might be it

[JamesM3M5]

Could also be metal filing buildup on the ABS sensors, water/corrosion in the plugs, or other connector problem in the ABS/ASC system. The wheel speed sensors do double duty for both ABS and ASC on cars so equipped.

[///\/\Power]

When was the last time you had your brake fluid flushed? I've heard of valves sticking in the ABS pump in the past due to water in the system.
Also you may want to check the alternator as mentioned before. I think the easiest way to check the voltage while the car is running is through the climate control system...(correct me if I'm wrong), but pressing the "auto" and "rear defrost" buttons at the same time accessing certain information. Using the fan (+/-) keys scroll to number 11.......this should read off the current voltage as either 140 or 145, which translates to 14.0 or 14.5.
Hope that helps......(oh, to exit press "Auto" and "recirc" button at the same time)

[Kevlar]

Check the brake pedal pressure sensor...

[dmw]

The brake fluid just got changed - no effect.

Where is the brake pedal pressure sensor?

[G. P. Burdell]

Do cars without DSC have a brake pedal pressure sensor?

[Keda]

This happens to me on very hot days when my car has been sitting in the sun. Since it goes away after I restart my car, I haven't really worried about it...sounds like I've been using computers too long.

I brought my car in to the dealer for it once. They dicked around w/it for a day and 'fixed' it under CPO warrantee. It happened again w/in a couple days.

[dmw]

Okay. I checked the alternator as instructed above. It reads between 125 at the lowest and 135 at the highest. Usually it is around 130-135. Is this the problem?

[CarbonBlkE36]

it should be runnin at about 13.4 volts or so, around there

[dmw]

so mine is normal?

[dmw]

My mechanic read the codes again. It is the brake pedal pressure sensor. What is it? Where is it? And how much will this cost me?

[Kevlar]

Originally posted by dmw
My mechanic read the codes again. It is the brake pedal pressure sensor. What is it? Where is it? And how much will this cost me?

IIRC...

The part is located below the brake resevoir in the engine compartment. The part is about $70-100 (it has been about 2 years since I had the part replaced). It took about 1 - 1.5 hours to replace the part...