Parts for your 2010 Subaru Impreza-Crank angle sensor

2010 Subaru Impreza crank angle sensor (crankshaft position sensor) – purpose, care and replacement

Technical references confirm the 2010 Subaru Impreza does use a crank angle sensor, more commonly called the crankshaft position (CKP) sensor in Subaru literature. The Subaru Factory Service Manual for the 2010 Impreza lists diagnostic routines and DTCs P0335/P0336 for this sensor, and the OEM parts catalogue (Subaru FAST) includes a dedicated crankshaft position sensor for EJ-series engines used in this model year. Major aftermarket catalogues and scan-tool databases echo the same fitment and fault-code coverage. So yes—this part is fitted and critical.

On the 2010 Impreza, the crank angle sensor feeds the ECU precise crank speed and position so it can fire the injectors and coils at the right moment. Without a clean signal, the car can be a pig to start, might stall randomly, or throw a Check Engine Light. Common symptoms include no-start, intermittent cut-out, rough idle and codes P0335–P0336. On most naturally aspirated EJ engines it’s mounted at the top of the engine block near the bellhousing area, accessible from under the bonnet.

There’s no scheduled service interval for the CKP sensor—it’s a solid-state unit—but a bit of preventative attention goes a long way. During regular servicing, it’s worth a quick look for oil leaks tracking onto the sensor or connector, cracked wiring insulation, or a loose mounting bolt. Keeping the harness clips secured and the connector clean and dry helps avoid intermittent faults that can have you stranded.

Replacement is straightforward for a competent DIYer or any workshop. Disconnect the battery, unplug the connector, remove the single retaining bolt, and wiggle the sensor out. Lightly lube the O-ring on the new genuine-quality sensor, seat it squarely, and tighten to factory spec. Clear fault codes, then check live data or a quick road test to confirm stable RPM signal and no new DTCs. Given how sensitive engine management is to signal quality, cheap no-name sensors can be false economy—OE or reputable aftermarket is the safe bet.

If the car’s clocking up the kilometres or sees plenty of dusty, wet, or off-road use, add a visual check of the CKP and its loom to the regular service checklist. It’s a simple step that keeps the Impreza starting first pop and running sweet as.

• Typical fault clues: hard start/no start, random stalling, misfire, CEL with P0335/P0336
• Good practice: inspect connector and wiring at each service, fix oil leaks promptly
• When replacing: use quality parts and follow FSM torque/specs

Popular questions about the 2010 Subaru Impreza crank angle sensor

What are the signs my Impreza’s crank angle sensor is failing?
Drivers often report a long crank or no-start when hot, sudden stalling at idle, or a rough, lumpy idle. The Check Engine Light may log P0335 or P0336. Intermittent issues that come and go with bumps or heat soak can point to a sensor or its wiring/connector rather than fuel or ignition hardware.

Can the crank angle sensor be cleaned instead of replaced?
If the tip is contaminated by oil or metal fuzz, a gentle wipe and fixing the source of the leak can restore a clean signal. But if the sensor’s internal electronics are failing, cleaning won’t cure it. Given the labour is minimal, replacing a suspect unit with a quality part is typically the reliable fix.

Is it safe to drive with a dodgy crank angle sensor?
Not really. A failing CKP can cause sudden stalls or a no-start after a quick stop at the servo. If the car still runs, it may leave you stranded without warning. Best to diagnose promptly and sort it before it escalates.