I recently changed the brake pads on my wifes.

ADAMCLEV

MEMBER
2003 OLDSMOBILE ALERO
30,000 MILES

I recently changed the brake pads on my wifes 2003 Alero. Easiest I've ever done! However after this the TRAC OFF, ABS, and SERVICE VEHICLE SOON lights are coming on (not always immediately) also the car is making a humming noise, airplane like I guess. It stops when I turn right. I was thinking wheel bearing, so I jacked car up checked for play (none) took everything apart again but still humming. I don't see how pad slapping it could contribute to this but find the timing off it odd. Also I just put the lug nuts on the wheel barely then set car down to tighten so wheel wouldn't spin. Could that be problem? Any thoughts would be greatly appreciated before I go to a mechanic and have to buy through problem after problem. Can't really afford that with first child in the way. But need car safe for same reason.
Thank you
Adam C

3 Replies

WRENCHTECH

MECHANIC
20,761 POSTS

It may have seemed easy but apparently something went wrong. You have trouble codes store in both the engine module and the ABS module. You would have to get those modules scanned to reveal the codes and they will point you in the right direction but I would suspect that you somehow damaged one of the speed sensors in one of the wheels.

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Monday, March 25th, 2013 AT 7:38 PM

ADAMCLEV

MEMBER
30 POSTS

If the lights don't happen to come on will the computer read any codes? If not my guess would be the mechanic telling me by what he hears I need bearings or something else and problem not be rectified. Also is it unsafe to drive this way?

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Monday, March 25th, 2013 AT 7:47 PM

WRENCHTECH

MECHANIC
20,761 POSTS

Yes, the computers store codes in memory. On the "service vehicle soon", that one is going to be the Body Control module, not the engine control.
I can't tell you if it is safe or not until you know what the problem actually is.

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Monday, March 25th, 2013 AT 7:50 PM