996 turbo abs light

[ChrisP911]

Ok I have a 2002 turbo and the abs Psm light have been on for 2 years now can't find the problem. The code reads right front speed sensor, I buy a new one less then a mile lights come back on. So I swap the two fronts abs Psm come back on still reads right front speed sensor. Anybody else have this problem.

[jwgn777]

I have not encountered this problem on my vehicle. Perhaps you should check the circuit wiring on the right front side for a break in the wiring and harness. Check your stop light switch and make sure you brake lights are working correctly.

[ChrisP911]

Yes brake lights are good...

I have not encountered this problem on my vehicle. Perhaps you should check the circuit wiring on the right front side for a break in the wiring and harness. Check your stop light switch and make sure you brake lights are working correctly.

[996TWINS]

You might need to clear the fault code.

[ChrisP911]

did that

Originally Posted by 996TWINS

You might need to clear the fault code.

[bell]

You're turbo is awd.........the axle has a toothed ring which the sensor reads, I would suspect it isn't there or is damaged which is why it's showing a fault.
Was there ever any suspension/axle work done on that corner?

[ChrisP911]

Hmmmm good question I bought the car like that. I am going to check it out and see thanks.

You're turbo is awd.........the axle has a toothed ring which the sensor reads, I would suspect it isn't there or is damaged which is why it's showing a fault.

Was there ever any suspension/axle work done on that corner?

[jwetering]

I doubt this issue crosses from the 996 normally aspirated to 996 Turbo but my ABS/PSM lights were coming on a couple of weeks ago and cleaning the MAF was the fix. I never followed up exactly why a dirty MAF caused the ABS/PSM error, I just tried a tip someone on-line gave me and it worked.

What I think though is that the MAF is in the circuit that PSM uses to cut back engine power. When the MAF is sending wonky signals, the PSM turns off, and it takes the ABS with it.

In my case the lights would come on a few minutes after a cold start, which is when the computer turns the MAF on. The MAF is not in the circuit for the first few minutes because the mixture is too rich.

Something like that anyway - fill in the blanks, or just forget about why and spray some electrical contact cleaner at the hot wire. Let it dry (blow some air on it) before you try running the car.