Why Is My Abs,4x4! And Traction Control Lights On?

If the traction control light comes on intermittently, there is a problem that may not be "hard coded," meaning it isn't a permanent condition yet. A flickering light could also mean that the system is not fully operational, so use extra caution in adverse road conditions.

Many traction control systems will illuminate the warning light when the system detects a loss of traction, like in snowy or rainy weather. Typically the light is seen when the system intervenes to maintain traction. It's a good idea to read the section in your vehicle owners manual to familiarize yourself with how your traction or stability system operates.

If the traction control light illuminates and stays lit without blinking, this means that the traction control system has been deactivated and there is no traction control available. There may even be a message broadcast by the driver information center warning that the traction control system is shut down and to use extra caution when driving, especially in water, ice, and snow.

The only way to properly resolve either of the above conditions is to have the vehicle properly diagnosed at a qualified repair shop. Always have the repair shop do a full computer systems scan. It may not necessarily be a fault in the traction control system that is setting the light. Sometimes a fault in the engine management system first shows up in the traction control system, such as an intermittently defective throttle position sensor in the electronic throttle control.

The basic mechanical components of the powertrain system must also be properly inspected. Anything that would cause a rough or jerky application of power can cause wheel slip, which means that worn drivelines, axles, and constant velocity joints are suspect. Even a harsh transmission shift or badly misfiring engine can cause wheel spin and illuminate the traction control light.

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