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DTC codes / P2Bxx · Hybrid propulsion / P2B71

P2B71Turbocharger/Supercharger A Temperature Sensor Range/Performance

P2B71 indicates that the powertrain control module (PCM) has detected an out-of-range or erratic signal from the temperature sensor integrated into the turbocharger or supercharger assembly, often called 'Charge Air Cooler Temperature Sensor' or 'Turbocharger Temperature Sensor'. The PCM compares this sensor's voltage against expected values for the current operating conditions and sets the code when the signal falls outside a calibrated window or fails a rationality check.

SystemPowertrain
Code typeGeneric (all makes)
SeverityMedium
Fix difficultyIntermediate
AreaHybrid propulsion

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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