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DTC codes / P23xx · Ignition system and misfire / P2397

P2397Diesel Intake Air Flow B Position Sensor Range or Performance

P2397 indicates that the engine control module has detected an out-of-range or performance fault in the intake air flow position sensor for the second intake air path, often called bank B or position B. The computer compares the sensor signal against expected values during key-on and running conditions and sets the code when the voltage or rationality check fails.

SystemPowertrain
Code typeGeneric (all makes)
SeverityMedium
Fix difficultyIntermediate
AreaIgnition system and misfire

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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