Parts for your 2022 Subaru Impreza-Camshaft sensor

2022 Subaru Impreza Camshaft Sensor — What It Does and When to Replace It

Based on Subaru technical documentation for the FB-series 2.0-litre engine used in the 2022 Impreza (as published via Subaru’s Service Manual/STIS) and OEM parts catalogues for the model year, the vehicle is fitted with camshaft position sensor(s). The engine management and AVCS (variable valve timing) strategy rely on cam and crank signals, and the factory diagnostics include DTCs such as P0340/P0341 related to the camshaft position circuit. So yes, the camshaft sensor is relevant and used on the 2022 Subaru Impreza.

On this Impreza, the camshaft sensor’s job is to tell the ECU exactly where the cam(s) are in relation to the crank. That real-time timing info lets the car fire injectors and spark in sequence and adjust valve timing to suit load, revs and temperature. The upshot is smooth starting, decent fuel economy, cleaner emissions and a responsive feel when the driver leans on the throttle.

There’s no set replacement interval for the cam sensor, it’s a fit-and-forget item that should last years. If it plays up, though, the dash will likely throw a check engine light and store codes like P0340/P0341. Drivers might notice long cranking, rough idle, flat spots, poor fuel economy or reduced power if AVCS is disabled. Oil contamination, damaged wiring, or a failing sensor are common culprits.

• Where it lives: typically on the cylinder head(s), near the cam sprockets, under the plastic engine cover.
• Quick checks: look for brittle wiring, loose connectors, or oil seeping around the sensor’s O-ring.
• Good habits: keep engine oil changes on schedule, clean oil helps protect the magnetic sensing surface.

Replacing the sensor is straightforward for a competent home mechanic with basic tools:

1. Park safely, let the engine cool, and disconnect the negative battery terminal.
2. Remove the engine cover, unplug the sensor connector, and unbolt the sensor.
3. Lightly oil a new O-ring, install the new sensor, and torque the bolt to spec (refer to the Subaru service manual).
4. Reconnect, clear any fault codes, and road test. An ECU “relearn” is usually automatic after a short drive.

Choosing a genuine or quality aftermarket sensor is wise, it keeps timing signals clean so the ECU can do its job. If faults persist after replacement, check the harness and grounds, then scan live data to confirm the cam/crank sync looks right.

FAQs

Does the 2022 Subaru Impreza have a camshaft sensor?
Yes. The FB20 engine uses camshaft position sensor(s) so the ECU can manage sequential injection and AVCS. It’s a core input alongside the crank sensor, and the factory diagnostics include cam sensor-related fault codes.

What are the symptoms of a bad camshaft sensor on a 2022 Impreza?
Common signs include a check engine light (often P0340/P0341), hard starting, rough idle, hesitation, poorer fuel economy and reduced power if variable valve timing is switched off for safety. Wiring or oil contamination can mimic a failed sensor, so a quick visual and scan check helps.

Can it be driven with a failing camshaft sensor?
It may run in a limited mode, but performance and fuel use will suffer, and stalling or no-start can occur. It’s best to diagnose and fix promptly to avoid getting stranded and to protect the catalytic converter from misfire.