P0390 Camshaft Position Sensor Trouble Code

Description and meaning of DTC p0390

This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles. Although generic, the specific repair steps may vary depending on make/model. This P0390 trouble code indicates that a problem was detected in the camshaft position sensorcircuit of bank 2. Since it says circuit, that means the problem couldlie in any part of the circuit - the sensor itself, the wiring, or the PCM. Don't just replace the CPS (camshaft position sensor) and think that will definitelyfix it. Note: The camshaft sensor B is generally the sensor on the exhaust camshaft. This code is basically identical to P0345, however refer to a vehicle specific repair manual to identify the correct sensor on your vehicle/engine.

p0390 diagnostic trouble code symptoms

Symptoms can include:Hard starting or no startRough running / misfiringLoss of engine power

DTC p0390 - possible causes

A code P0390 could mean one or more of the following has happened: a wire or connector in the circuit could be grounded/shorted/brokenthe camshaft position sensor may have failedthe PCM may have failedthere exists an open circuitthe crankshaft position sensor may have failed

How to fix OBD-II diagnostic trouble code p0390

With a P0390 OBD-II trouble code, diagnosis can be tricky at times. Hereare some things to try:Visually inspect all the wiring and connectors in the circuitCheck for continuity in the circuit wiringCheck the operation (voltage) of the camshaft position sensorReplace the camshaft position Sensor Bs requiredCheck the crankshaft position circuit as wellReplace circuit wiring and/or connectors as requiredDiagnose/replace the PCM as required

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