C0042
Brake Pedal Position Sensor Circuit A
C0042 is an OBD-II diagnostic trouble code meaning: Brake Pedal Position Sensor Circuit A. Common causes: open or short circuit in the sensor circuit, poor contact in the sensor connector. Estimated repair cost: $56–167.
Symptoms
- Check Engine Light Is On
- Cruise control doesn't work
- Problems with the ABS system
- Incorrect operation of brake lights
Causes
- Open or short circuit in the sensor circuit
- Poor contact in the sensor connector
- Malfunction of the brake pedal position sensor itself
- Wiring Harness Problems
- ECU malfunction
How to Fix
- Check the integrity of the wiring harness and connectors
- Check the resistance of the brake pedal position sensor
- Replace sensor if necessary
- Check and clean connector contacts
- Scan the system for other errors
Related codes
Error C0042 by Vehicle Brand
FAQ
What does the C0042 code mean?
C0042 is an OBD-II diagnostic trouble code that indicates: Brake Pedal Position Sensor Circuit A
What causes a C0042 error code?
The most common causes of C0042 include: Open or short circuit in the sensor circuit; Poor contact in the sensor connector; Malfunction of the brake pedal position sensor itself; Wiring Harness Problems.
How do I fix a C0042 diagnostic trouble code?
To fix C0042: Check the integrity of the wiring harness and connectors. Check the resistance of the brake pedal position sensor. Replace sensor if necessary. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C0042?
Do not drive — repair immediately
How much does it cost to fix C0042?
The estimated repair cost for C0042 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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