What does code P1146 mean?

P1146 · SubaruPressure Sensor Circuit Range Performance Problem High Input

P1146 on a Subaru indicates that the engine control module (ECM) has detected a high input voltage from a pressure sensor circuit, meaning the signal wire is reading above the expected range for the current operating conditions. This typically points to a sensor that is reporting pressure higher than physically possible, or a wiring fault that is shorting the signal to a voltage source.

SystemPowertrain

Code typeSubaru specific

SeverityMedium

Fix difficultyIntermediate

AreaFuel and air metering

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