Traction Control System Switch Circuit Malfunction
What does C0142 mean?
The C0142 code means the vehicle's onboard diagnostic system has detected: Traction Control System Switch Circuit Malfunction. This is a low severity code.
Common Symptoms
- Traction control cannot be turned off with button
- Traction control light stays on regardless of switch
- ESC off button not responding
- Warning message for traction control switch
- Switch indicator light not illuminating
Probable Causes (Ranked by Likelihood)
- Faulty traction control switch Very High
- Corroded switch connector High
- Wiring fault at TCS switch Moderate
- BCM or ESC module switch input fault Low
Step-by-Step Diagnostic Procedure
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Test traction control switch with scan tool input monitor
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Check switch connector for corrosion
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Test switch continuity with multimeter
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Inspect wiring from switch to ESC module
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Verify ESC module receives switch signal
Frequently Asked Questions
When would I want to turn off traction control?
Some situations like driving in deep snow, mud, or sand benefit from turning traction control off. The system can cut power too aggressively in these conditions, making it harder to maintain momentum.
Is the traction control button the same as the ESC button?
Some vehicles have separate buttons while others combine both functions into one. Pressing once may disable traction control and pressing again or holding may disable ESC.
Does traction control turn back on automatically?
On most vehicles, traction control re-enables automatically when the engine is restarted, even if you turned it off previously. This is a safety feature.