Right Front Wheel Speed Sensor Circuit High
The C0042 code means the vehicle's onboard diagnostic system has detected: Right Front Wheel Speed Sensor Circuit High. This is a critical severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- moderate
- Estimated cost
- $100 - $400 (parts and labor)
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Common Symptoms
- ABS warning light on
- Right Front speed reads abnormally high on scan tool
- Traction control erratic
- ABS activates unexpectedly
Probable Causes (Ranked by Likelihood)
- Shorted right front wheel speed sensor Very High
- Sensor wiring shorted to voltage source High
- Electromagnetic interference near sensor Moderate
- ABS module input circuit fault Low
Step-by-Step Diagnostic Procedure
-
Measure right front sensor output voltage range
-
Check sensor wiring for shorts to power
-
Inspect wiring routing near ignition components
-
Compare sensor readings across all wheels
Frequently Asked Questions
What does code C0042 mean?
C0042 indicates a problem with the right front wheel speed sensor circuit causing high signal output.
Can I drive with code C0042?
You can drive short distances, but ABS and traction control will be disabled. Avoid slippery roads.
How much does it cost to fix C0042?
Wheel speed sensor repairs typically cost $100 to $400 including parts and labor.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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