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2004 pontiac grand am has ABS light on, Low Trac light on, and Service Engine Soon light on..They came on after a couple days of a loud grinding/vibration noise coming from under the car. Visually, everything looks good. What could this be? It generally only makes the noise when driving straight or turning right. The noise has been going on for about 4 days and the lights came on around the 3rd day and both continue.
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You can test the wheel speed sensors by unhooking the connectors and put ohmeter test leads on the sensor terminals should read around 1100-1600 ohms also the connectors themselves were bad for wires breaking inside the insulation at the connectors from flexing when the wheel is turned back and forth..Note excessive wheel bearing noise from bad bearings have also been known for interferring with clean abs signal also causing abs codes good luck
If you are using an obd2 reader, make sure it has all the updates. If the check engine light is on, is should show up on reader. There is also a ABS light tester as well. It sounds like an error in the ABS/Trac cirucuits. It could be a bad pump or faulty module.
Sounds like you have a bad wheel speed sensor. You need to have it scanned. Since it's been sitting, it might just be a bad connection to one of the speed sensors.
It is one of your wheel bearings. The problem is easily solved by taking the car to a dealer, or having a code reader, and determining which wheel bearing is bad. The wheel bearing is under $150 and should be installed by someone with some muscle, as the bolts are torqued from the factory extremely tight in a tight location. The wheel bearing have all of your sensors for abs built into them and if that sensor goes out your computer tells the abs and traction control to shut down, hence you get the lights on on the dash.
I have this same problem and had it checked. It is the wheel sensor. Mine is the passenger front right wheel sensor. According to the mechanic I take it to the GrandAm's are known for this. The part is about $40.
"...should not have to have to deal with these issues"
Agreed! But, there seems to be a glitch involving the ABS and TRAC system. On my 99 GAGT, when the eng and tranny are cold, I tend to get an ABS fail during turn/brake instances. If I restart the engine, it generally goes away. I've done a bit of research and have found nothing that fives a definitive answer to this. If you take it to the dealer, it will cost an arm and a leg for the troubleshooting alone. I'd recommend driving it as is provided you can get the ABS to reset by restarting the engine. Sorry I can't provide any better solution...
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