C0046
Brake Pressure Sensor A/B
C0046 is an OBD-II diagnostic trouble code meaning: Brake Pressure Sensor A/B. Common causes: brake pressure sensor malfunction, open or short circuit in wiring harness. Estimated repair cost: $56–167.
Symptoms
- ABS/ESP indicator is on
- Unstable operation of the anti-lock braking system
- Reduced braking performance
- Activating the emergency brake system
Causes
- Brake pressure sensor malfunction
- Open or short circuit in wiring harness
- Poor contact in the sensor connector
- Low brake fluid level
- Air in the brake system
How to Fix
- Check the brake fluid level
- Inspect the wiring harness and sensor connectors
- Check sensor resistance and voltage
- Replace brake pressure sensor if necessary
- Diagnose the ABS/ESP system after repair
Related codes
Error C0046 by Vehicle Brand
FAQ
What does the C0046 code mean?
C0046 is an OBD-II diagnostic trouble code that indicates: Brake Pressure Sensor A/B
What causes a C0046 error code?
The most common causes of C0046 include: Brake pressure sensor malfunction; Open or short circuit in wiring harness; Poor contact in the sensor connector; Low brake fluid level.
How do I fix a C0046 diagnostic trouble code?
To fix C0046: Check the brake fluid level. Inspect the wiring harness and sensor connectors. Check sensor resistance and voltage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C0046?
Limited driving only, diagnose soon
How much does it cost to fix C0046?
The estimated repair cost for C0046 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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