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DTC codes / C05xx · Brakes, steering and suspension / C05B6
The C05B6 code indicates that the powertrain control module (PCM) or body control module (BCM) has detected an out-of-range or performance issue with the brake booster temperature sensor circuit, specifically the 'C' circuit. This sensor monitors the temperature of the brake booster to prevent overheating and ensure proper brake assist function, and the code sets when the sensor signal voltage or resistance falls outside the expected range for the current operating conditions.
Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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