Question about 2001 Oldsmobile Alero

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Enhanced Traction System Warning Light (TRAC OFF)

This warning light (TRAC OFF) sporadically comes on and stays on for no apparent reason. The car (2001 Chevy Cavalier, just over 16,000 miles, auto trans, 2200 SFI 4 cyl. engine) runs and drives fine and is regularly serviced. Had a local service facility look at this once and was told all they did was disconnect the battery for a period to allow the "system to reset itself." Consequently, I've done this a few times myself. The light went off, stayed off, but, as mentioned, sporadically comes back on. I've searched the internet for an answer and could not find one.

Any ideas or a solution???????????????????????

Thanks.
James Terlop
j.terlop@cox.net I too have the "Trac Off" probelm with my 2001 Olds Alero (since Sep 08). It eventually goes off (when I stop for any amount of time)but will come back on out of the blue again when I'm driving. I'v had an engine diagonostic performed, and nothing out of the ordinary shows up.

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  • carrissa1420 Mar 21, 2009

    i have the same problem i have a 2001 oldsmobile alero and the light comes on and it doesnt want to shift gears have you had the same problem or did the car act any different then it normally does

  • caddilove84 Apr 22, 2009

    my car has the same problem... whenever the trac light comes on the car slows down and gears kick when they shift..

  • Anonymous Mar 21, 2014

    service traction system light comes on when start up after about 2 minutes goes off-but on rite shows trac off that stays lit-how do service traction system

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  • 4 Answers

I have the same problem, dealer says its the trac sensor on one of the front hubs . to fix the problem you have to replace the wheel bearing assembly. you cant buy just the sensor, dealer wants 400.00 do it yourself for 100.00 or less shop for parts on line or cover the light with black tape it will not hurt anything

Posted on Mar 05, 2009

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I keep getting a message service stabilitrak


StabiliTrak Indicator Light: If the warning light does not come on then, have it fixed so it will be ready to warn you if there is a problem. If it stays on, or comes on when you are driving, there may be a problem with your StabiliTrak system and your vehicle may need service. When this warning light is on, the system is off and will not limit wheel spin. Adjust your driving accordingly.

This light will also flash when the StabiliTrak system is active. If the StabiliTrak system warning light comes on and stays on for an extended period of time when the system is turned on, your vehicle needs service.

The traction control part of StabiliTrak can be turned off by pressing and releasing the StabiliTrak button if both systems (traction control and StabiliTrak) were previously on. To disable both traction control and StabiliTrak, press and hold the button for five seconds.

Traction control and StabiliTrak can be turned on by pressing and releasing the StabiliTrak button if not automatically shut off for any other reason.

When the TCS or StabiliTrak system is turned off, the StabiliTrak light and the appropriate TCS off or StabiliTrak off message will be displayed on the DIC to warn the driver. Your vehicle will still have brake-traction control when traction control is off, but will not be able to use the engine speed management system.

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Why does my traction off light come on?


You either have a problem with your engine control system, the traction control system, or you are not in the correct gear. See the explaination below. This is from the 2000 Chevrolet Cavalier Owner's Manual.

TRAC-OFF LIGHT

... If you turn the system off by moving the shift lever

to FIRST (1) or SECOND (2), the warning light will

come on and stay on. To turn the system back on,

move the shift lever back to a position other than

FIRST (1) or SECOND (2). The warning light

should go off. (See "Enhanced Traction System"

in the Index for more information.)

 The warning light will come on when you set your

parking brake with the engine running, and it will

stay on if your parking brake doesn't release fully.

If the transaxle shift lever is in any position other

than FIRST (1) or SECOND (2) and the warning

light stays on after your parking brake is fully

released, it means there's a problem with the system.

 If the traction control system is affected by an

engine-related problem, the system will turn off

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If the Enhanced Traction System warning light comes

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Could be something going on with a wheel speed sensor. You'll have to have the ABS/TCS controller scanned for any stored trouble codes to see why the controller is turning on the light. The code(s) might help you to determine what part of the system is faulting. You'll have to take it to a shop that has a high end scan tool.

If the TC light is on, chances are there is a trouble code set and stored in the computer. You need to determine what the code is. If you take the car to a nationally recognized parts store, most will scan the computer for free, so there is no money out of pocket for you.


Actron also makes a ABS code checker called BrakeScan. Don't know how good it is, but it might be good for a DIY person.

TC Explanation:

If your vehicle is equipped with the Enhanced Traction System (ETS), this warning light should come on briefly as you start the engine. If the warning light does not come on, then have it fixed so it will be ready to warn you if there is a problem.
If the warning light stays on, or comes on when you are driving, there may be a problem with your Enhanced Traction System and your vehicle may need service. When this warning light is on, the system will not limit wheel spin. Adjust your driving accordingly.
The Enhanced Traction System warning light may come on for the following reasons:
If you turn the system off by moving the shift lever to FIRST (1), the warning light will come on and stay on. To turn the system back on, move the shift lever back to a position other than FIRST (1). The warning light should go off. The warning light will come on when you set your parking brake with the engine running, and it will stay on if your parking brake does not release fully. If the transaxle shift lever is in any position other than FIRST (1) and the warning light stays on after your parking brake is fully released, it means there is a problem with the system. If the traction control system is affected by an engine-related problem, the system will turn off and the warning light will come on. If the Enhanced Traction System warning light comes on and stays on for an extended period of time when the transaxle shift lever is in any position other than FIRST (1), your vehicle needs service.


Thanks for using FixYa - a 4 THUMBS rating and POSITIVE TESTIMONIAL are appreciated for answering your FREE question.

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EST - Enhanced Traction System

This light should come on briefly as you start the engine.
When the warning light is on, the system will not limit wheel spin.
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