ABS Light, Traction Control, Service Vehicle Soon light comes on..and car drives fine
 

I'm recently having this issue with my 2004 alero. The problem mentioned on the title happened recently and it appeared 4 times this month. Car drives fine and it doesnt seem to have any issues at all, I had to pull over, turn off the car, and turned it back on and the lights on the dash will just go away. Anyone else experiencing this problem? Any tips or ideas on what might cause this? Thanks

the sensor in the wheel bearing is on its way most likely....and you can't just get the sensor. i know the sensor on mine is part of the wheel bearing. bring it some when it happeans again and have it scanned just make sure they have an abs scan tool

99Alero is correct, the sensor is built into the wheel bearing, and cannot be changed without changing the bearing.
Check the connectors at each wheel for corrosion, contact, chafed or kinked/broken wires, etc. Also check the brake fluid, as low fluid will cause ABS/Trac lights.

An ABS capable scan tool will give you the most reliable diagnosis, of course.

I agree about the sensor. That is most likely the culprit.

Definitely a ABS sensor on one of the corners.

Ive got the same issue.
They have been known to go bad when the wheel bearing is on its way out.

I have the same problem on my 2001 Alero. I had both front hubs changed and the problem went away for about 2 weeks then came back.

The lights come on now 10 seconds after i turn the car on. I have new hubs, new rotors and brake pads.

I started hearing a grinding noise and I want to get this fixed before it kills my rotors.

I havent hooked the car to a computer to get a code.

I think it might be the wire connecting the hub to the car? Probably broken or faulty wire? I was thinking of takign the wheels off and spraying some WD 40 in the connectors.

Any ideas?

The rear hubs have ABS sensors also, just like the fronts. You may have a bad rear hub.
The wires have also been a problem area, as have loose/corroded connectors at all four wheels. I wouldn't use wd40, I'd use some electrical contact cleaner instead.

Ouch, that means I might have to change the rear hubs too. That's going to cost a lot. I might try to disconnect the plus and drive without ABS for the next few months and get an inspection sticker.

I Have just replaced both of my bearings this year. both times all my lights were on (abs, traction and sevice vehicle) Its very possible that that bearing is on its way out, and triggers your lights, but the bearing will run quiet for a long time. Its just a matter of time before you get that grundging noise.

Also, if you have replaced your bearings and brakes and still get a metal scraping noise, (this happened to me twice) Check the metal dust plate that your ABS sensor clips on to, sometimes you may bend it out of place and it will scrape the back side of your rotor creating that noise.

So today again I went ot the mechanic who told me that the left front bearing was bad. Like i mentioned before both front bearing were replaced 3 months ago.

So here I go again and bought a bearing at autozone for about $80 and brought it to the mechanic. The mechanic changes it and I pick the car up but the 3 lights are still on. Mechanic then tells me that they are one because the bearing are not connected.

Well I told him to disconnect the bearing wires thing since even connected the lights were coming on. So what gives?? new bearings and still the lights are still on?

I'm desperate to find a solution at this point.

You have to plug the bearings sensor wires in, if you keep them unplugged like you stated ,your lights will stay on.

But even plugged in the lights stayed on. I dont know what to do. Might the computer be broken?

I might take off the wheels myself to look at the wires. That's the second bearing I have changed in 3 months.

Look at the wires, the harness is known to be too short on some years of Alero, causing wire breakage. A BCM problem is possible, but less likely and you would probably have other symptoms besides just the lights. Get the car scanned with a TechII or equivalent scan tool before you throw any more $ at it. Also, go with a good quality bearing, not just the cheapest thing you can get.

Iflow is correct, get your car properly scanned. If your lights are still on even when the new bearing are plugged in, i would say that its your wires that run from the vehicle to the bearing.

So I had both bearings changed again and lights went away but after 2 months from time to time only the 'Track' light comes on. Not the 'Trackoff' but only the 'Track'

What gives?

LOW TRAC

When your Enhanced Traction System is
limiting wheel spin, this light will come on.
Slippery road conditions may exist if the Enhanced
Traction System active light comes on, so adjust your
driving accordingly.
The light will stay on for a few seconds after the
Enhanced Traction System stops limiting wheel spin.
The Enhanced Traction System active light also comes
on briefly when you turn the ignition key to ON. If the
light doesn’t come on then, have it fixed so it will be

there to tell you when the system is active.

The trac light is random. Like it disappeared on Monday and hasnt come back on yet. It is strange that it rrandomly comes on. It hasn't rained or anything.

The car drives normally ven though the light is on.

I have had this same problem for a while on a 2001 Alero. SVS, ABS, Trac Off lights all one. Needed a new tire so the full service place to which I took it scanned the codes for me. Told me it was the right front. Got some deoxIT and sprayed the connections. Started the car and the lights were off. So I hit the other 3 conncections. Started the car and the lights were off. Went out 2 hours later and started the car, the lights were on. Turned it off, turned it back on, the lights were off.

I'm at a loss for what's going on. Seems to me that intermittent indicator lights usually point to a bad connection. If something is mechanically wrong I would guess that the lights would stay on. But I've cleaned all connections, including the one throwing the code. I also checked the wiring where it bends the most (to the right front wheel). Wiring looks fine. I wrapped some electrical tape around it and repositioned it so that the bend would be less acute.

It's a mystery at this point.

It’s none of that.
 

It is your (abs control module) 100 % . I was lucky and found one at a junk yard. A new one runs about $750..it’s located right under/next to the brake fluid resivor . Be very careful not to bend the little injectors that pump the brake fluid when needed. Or brake lines

Module
 

it’s your abs control module. Located directly under/next to the brake fluid resivor