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DTC codes / P00xx · Fuel and air metering and auxiliary emission controls / P0073

P0073Ambient Air Temperature Sensor Circuit High

P0073 means the ambient air temperature sensor circuit is reporting a voltage higher than the powertrain control module expects, which usually indicates an open circuit or a sensor reading that is out of range. The computer has detected a signal voltage above its calibrated threshold for the ambient temperature input, so it flags the circuit as high.

SystemPowertrain
Code typeGeneric (all makes)
SeverityLow
Fix difficultyIntermediate
AreaFuel and air metering and auxiliary 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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