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DTC codes / P01xx · Fuel and air metering / P012E

P012ETurbocharger/Supercharger Inlet Pressure Sensor A Circuit Intermittent/Erratic

P012E indicates that the powertrain control module has detected an intermittent or erratic signal from the turbocharger or supercharger inlet pressure sensor A circuit. The computer expects a stable voltage or pressure reading that changes smoothly with engine operation, but instead sees the signal dropping out, spiking, or jumping unpredictably, which prevents reliable boost control and can trigger reduced power modes.

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

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.

Running on fumes Free guides aren't free to make. Top up the tank. Any amount, one time. Fuel the Garage