Question about 2002 Cadillac Deville

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Traction control light comes on when wheels are not skidding

Traction control light comes on intermittently even when the rear wheels are not slipping. The traction control system can be turned off when this happens and this stops the system from coming on. This is in a 2003 Mercury Marauder. What could be the problem ?

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  • b1vjgb3 May 25, 2009

    The back tires are new 11/32 tread depth, the front tires are the same size, with 4/32 tread depth.



    The tires on the back were just put on the car.

  • b1vjgb3 May 25, 2009

    Yes. It started happening right after the tires were replaced.

  • b1vjgb3 May 25, 2009

    This is a 2003 Mercury Marauder.



    It came with 245x55x18 on the back and 235x50x18 on the front.



    I changed the back tires to 255x55x18 and left the 235x50x18 on the front over two years ago with no problems.



    This time around I put 255x55x18 on the front as well. This is when the traction control started acting up.



    Could this be the problem ?

  • b1vjgb3 May 25, 2009

    No. They are on the front.

  • thomas tysiak May 11, 2010

    did it start happening after u replaced the tires

  • thomas tysiak May 11, 2010

    check the sensor on all four corners for a build up of dirt or metal are all 4 tires about the same as far as size and tread depth

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The major difference in the tire size is enough to cause the traction control to activate the car sees a speed difference between the front and rear tires and thinks it is slipping it will continue until you replace the other two tires

Posted on May 25, 2009

  • thomas tysiak May 25, 2009

    yes are the tires with the least tread on the back

  • thomas tysiak May 25, 2009

    if the car came with different size tires front to rear stock then putting the same size tires on all 4 will cause the light to go on as well if you want to keep all 4 tires the same size you may be able to have the dealer reprogram the tire size into the computer

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06-10: Traction Control 1996 Contour, Mystique Workshop Manual
DESCRIPTION AND OPERATION Traction Control System The optional traction control system is designed to control wheel spin when accelerating on slippery or loose surfaces. Traction control system is available only with anti-lock brakes. The traction control system includes the following components:
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  • Throttle control actuator (9N825).
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  • Front brake anti-lock sensor (2C204).
  • Rear brake anti-lock sensor (2C190).
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  • Traction control braking and throttle control occur at vehicle speeds up to 50 km/h (30 mph).
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  • If speed control is operating when traction control system engages the traction control system will disengage speed control through the use of a speed control relay. This action is the same as applying the brake pedal with speed control engaged.
1996 contour
Traction Control Switch The traction control switch is located on the instrument panel, left of the steering column.

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