C0142 low

Traction Control System Switch Circuit Malfunction

The C0142 code means the vehicle's onboard diagnostic system has detected: Traction Control System Switch Circuit Malfunction. This is a low severity code.

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Keep driving?: Yes, but fix soon
DIY difficulty: easy
Estimated cost: $30 - $200 (parts and labor)

Read ABS Codes

BlueDriver Bluetooth Pro Scanner

Basic scanners cannot read ABS codes. BlueDriver reads all systems including ABS, SRS, and transmission through your phone.

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Read ABS Codes

LAUNCH CRP123X (Reads ABS + Chassis)

Basic scanners cannot read ABS codes. This one reads all four systems so you know exactly which sensor failed.

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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

Test traction control switch with scan tool input monitor
Check switch connector for corrosion
Test switch continuity with multimeter
Inspect wiring from switch to ESC module
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.