C05B4
Brake Booster Temperature Sensor C Circuit High
C05B4 is an OBD-II diagnostic trouble code meaning: Brake Booster Temperature Sensor C Circuit High. Common causes: brake booster temperature sensor malfunction, short circuit in the sensor circuit. Estimated repair cost: $56–167.
Symptoms
- Check Engine Light Is On
- Reduced braking performance
- Disabling Brake Assist
Causes
- Brake booster temperature sensor malfunction
- Short circuit in the sensor circuit
- Broken or damaged wiring
- Problems with sensor connectors
- Malfunction of the brake system control unit
How to Fix
- Check the integrity of the sensor wiring and connectors
- Measure the sensor resistance (compare with nominal values)
- Check the voltage in the sensor circuit
- If necessary, replace the brake booster temperature sensor
- Reset the error and check if it returns
Related codes
Error C05B4 by Vehicle Brand
FAQ
What does the C05B4 code mean?
C05B4 is an OBD-II diagnostic trouble code that indicates: Brake Booster Temperature Sensor C Circuit High
What causes a C05B4 error code?
The most common causes of C05B4 include: Brake booster temperature sensor malfunction; Short circuit in the sensor circuit; Broken or damaged wiring; Problems with sensor connectors.
How do I fix a C05B4 diagnostic trouble code?
To fix C05B4: Check the integrity of the sensor wiring and connectors. Measure the sensor resistance (compare with nominal values). Check the voltage in the sensor circuit. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C05B4?
Limited driving only, diagnose soon
How much does it cost to fix C05B4?
The estimated repair cost for C05B4 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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