Question about 1994 Pontiac Grand Prix

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What does it mean when a lite comes on saying low trac

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  • Pontiac Master
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It means the car has low traction, such as spinning on gravel, or in wet grass. I listen several cases with this problem, with the light on constantly after I had new tires put on.

The low traction and ABS systems work together. The most likely cause, is 1 of 2 things:
1: Broken wiring on any of the 4 wheel sensors. They operate using a magnetic pickup coil and toothed rotor, that for the front wheels is part of the hub assy. It happens due to age or vibration, and in winter ice can build up, as well as if you run over objects that will pull the wiring.
2: Wiring shorting out, for the same reasons in cause 1 stress, or even if the pickup coil should break or rub against the frame or wheel hub.
Using an ohm meter is the best way to check them. The vehicle will need to be placed on a lift, and all of the wheels removed, or if your a DIY then one at a time each jacked, and placed on jack stands and wheels removed to gain access to the backside of the hubs. Bend the tab and disconnect the plug to gain access.


Measure across the pins going into the hub, should produce a resistance, typically around 20 ohms but the key is that it measures the same on each sensor. Then measure it also between either wire to ground (hub itself) should be infinite.


Beyond that will require the module (TCS) located near the master cylinder unit of the brakes, be either serviced or replaced. GM states to re-train it that you disconnect your battery for a period of time, usually overnight.


If you perform that, you will find the low traction goes thru a learning period.


During that period, I advise to drive into sand or snow, watch the dash while doing a very short acceleration enough to cause mild wheel slippage, in which the front brakes will apply themselves, causing low traction light to come on. Once it learns that the wheels are not out of control, it will stay off. During the training period it will light up, mainly at takeoff from a full stop. Once it figures out things, it should not come on during normal driving.

Good luck (remember rated).

Posted on May 16, 2010

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Posted on Jan 02, 2017

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toneman2121
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SOURCE: Trac light off

Your car is equiped wth traction control. there is a switch, usually on the shift lever or front panel to turn it on and off. I beieve it works by applying the brakes to the wheel that slips.

Posted on May 06, 2010

jturcotte
  • 8273 Answers

SOURCE: Hello, what does it mean

traction control enables when one wheel spins (low trac indicator lights) due to water/ice, etc. Traction control disables the differential so that both drive wheels will turn, thus increasing traction. Once conditions improve, traction control will disable (trac off) and reenable the differential.

Posted on Aug 24, 2010

jturcotte
  • 8273 Answers

SOURCE: i notice thier's a light comes on that say low

Your anti-lock braking system has detected a wheel is slipping or at least the wheels on different sides of the car are turning at different rates.

Posted on Sep 12, 2010

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I don't understand the whole traction light thing. my car always says trac off-except when it says low trac and slides like it's on ice.


TAKE CAR TO A GARAGE OR DEALERSHIP HAVE THE ABS BRAKES AND TRACTION CONTROL CODE SCAN.YOUR ABS BRAKE SYSTEM WILL COME ON ADJUSTING BRAKE PRESSURE TO AVOID A SKID.THAT WHY LOW TRAC LIGHT COMES ON. MOST OF THE TIME WHEN YOU SEE LOW TRAC LIGHT DRIVING ON DRY ROADS PROBLEM IS IN THE ABS BRAKE UNIT OR BAD WHEEL SPEED SENSOR.

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I notice thier's a light comes on that say low trac what does that mean


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2. TRAC Off means Traction Controln is off

3. Check simply indicates that there is an issue being communicated from the onboard computer.

Take the car for a scan dear.

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What does trac off light refer to? service engine and trac off light comes on.


Trac is the control that doesnt let your tires spin when they are not making contact with the road. Just by having your emergency brake on will light up the trac light. It also come on with your abs. If you driving on a slick road and you jam on your brakes and the tires slide a little mine will say low track on my car.

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