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DTC codes / P24xx · Auxiliary emission controls / P24BF

P24BFEVAP System Leak Detection Pump Switching Valve Control Circuit High

P24BF indicates that the powertrain control module (PCM) has detected an abnormally high voltage on the control circuit for the evaporative emission (EVAP) system leak detection pump switching valve. This typically means the circuit is shorted to voltage, the valve's internal coil is open, or the PCM driver is faulty, preventing the valve from switching as commanded.

SystemPowertrain
Code typeGeneric (all makes)
SeverityMedium
Fix difficultyIntermediate
AreaAuxiliary emission controls

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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