Thread: ABS, Brake, P, and ! lights all on

All these light have now came on along with the low trac light on the center of the dash above the stereo. Im also noticing when braking normally that the brake pedal is being held up like if the car is braking on ice and sliding. Its summer time now so there is no ice or slick surfaces this is just happening for no reason, I did not go to a dealer but took the car to a trusted local mechanic who works on all American vehicles. He said that from what he found out was that the ABS computer got messed up and just needs to be reset. He didnt have the right computer tools to do this and said that the Dealer ship was the only people that could do that? Has any one else experienced this problem and does that sound right? Just want to know before i go to the dealer.

I was able to find this site with the samples problem and he said it was fixed by swapping out his wheel bearing hubs? Again want to see if this seems true before spending the time and money.

ABS, TCS OFF & SES Warning Lights Troubleshooting Guide - GM Pontiac Grand Prix Anti Lock Braking System & Traction Control System Problems

looks like you found your answer.

had the same probs, had the bearing replaced 2 times, left front, still doing it, suspect is the brain ( ABS ). SSSSOOOOOOO, back in the freakin' shop. AARRRGGGHHH!!!!

Just a quick followup, when my mech. was testing, he had a sensor wired into the wiring for the traction control. When he removed it, BAM, the problem went away. I believe the problem lies with the wiring coming out of the bearing/ sensor. Hopefully, this helps.

Originally Posted by 04muscle

Just a quick followup, when my mech. was testing, he had a sensor wired into the wiring for the traction control. When he removed it, BAM, the problem went away. I believe the problem lies with the wiring coming out of the bearing/ sensor. Hopefully, this helps.

So you are saying that when you replaced the hubs all you lights were still on? I replaced them last week and they went off instantly and ever thing was good again. What do you mean by "he had a sensor wired into the wiring for the traction control" is this some thing he did to test or this was there from GM when the car was made? Since i fixed this problem my traction control is still kicking in when it shouldn't but im not getting any lights on the dash, may be what you are saying could help my ABS issue, please explain more about the sensor.

Sorry, I should have been specific. My abs/traction control would engage at slow speed, no lights on dash. At the shop, they wanted to attach sensors to the 4 corners to try and tell where the fault was. The sensors are like needles, they are slid into an electrical connection. the problem would not repeat itself. so the theory is that when the probe went into the connection, it made the wires connect better, and the problem went away. The problem of course, is that I don't know where exactly the connection is. But I am certain it is left front, the wire from the hub/bearing going toward the brain.