C0040
Brake Pedal Switch A
C0040 is an OBD-II diagnostic trouble code meaning: Brake Pedal Switch A. Common causes: brake pedal sensor malfunction, open or short circuit in wiring harness. Estimated repair cost: $22–56.
Symptoms
- Incorrect operation of ABS or ESP
- Disabling cruise control
- Check Engine Light Is On
- Problems starting the engine (in some models)
Causes
- Brake pedal sensor malfunction
- Open or short circuit in wiring harness
- Oxidation of contacts
- Incorrect sensor adjustment
How to Fix
- Check the condition of the brake pedal sensor
- Inspect the wiring harness for damage
- Clean contacts from oxidation
- Check sensor adjustment
- Replace sensor if necessary
Related codes
Error C0040 by Vehicle Brand
FAQ
What does the C0040 code mean?
C0040 is an OBD-II diagnostic trouble code that indicates: Brake Pedal Switch A
What causes a C0040 error code?
The most common causes of C0040 include: Brake pedal sensor malfunction; Open or short circuit in wiring harness; Oxidation of contacts; Incorrect sensor adjustment.
How do I fix a C0040 diagnostic trouble code?
To fix C0040: Check the condition of the brake pedal sensor. Inspect the wiring harness for damage. Clean contacts from oxidation. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C0040?
Limited driving only, diagnose soon
How much does it cost to fix C0040?
The estimated repair cost for C0040 is $22–56. Actual cost depends on your vehicle, location, and labor rates.
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