Parts for your 2015 Subaru Legacy-Crank angle sensor

2015 Subaru Legacy crank angle sensor (crankshaft position sensor)

Technical sources confirm the 2015 Subaru Legacy is fitted with a crank angle sensor (commonly called the crankshaft position sensor). The Subaru 2015 Legacy/Outback Factory Service Manual lists DTCs P0335–P0339 for the crankshaft position circuit in the Engine Diagnostics section, and the Subaru genuine parts catalogue specifically lists the crankshaft position sensor for FB25 and EZ36D engines used in this model year. Standard OBD-II documentation for these codes is also referenced in Subaru’s diagnostic procedures, so the crank angle sensor is absolutely relevant on this vehicle.

On a 2015 Subaru Legacy, the crank angle sensor is a small, rugged, electronic pickup that watches a toothed wheel on the crankshaft and feeds timing data to the engine control module. That live “where-the-crank-is” info is the heartbeat for spark timing and fuel injection. Without it, the Legacy can crank but won’t fire, or it may cut out unexpectedly. It’s not a regular service item like filters or plugs, but it’s critical to smooth running, good fuel economy, and clean emissions.

Owners might notice tell-tales if the sensor or its wiring is on the way out: long cranking, random stalling at lights, a dead tach when it dies, or the check engine lamp with codes such as P0335. Sometimes the issue isn’t the sensor itself but a damaged connector, chafed loom, or oil contamination around the mounting area. A quick visual under the bonnet to make sure the connector is latched, clean, and strain-relieved can save a lot of grief.

Replacement is straightforward for a competent home mechanic, though many will prefer a workshop. The sensor is mounted to the engine block and reads a tone wheel on the crank, access varies slightly by engine. Usual steps are to disconnect the battery, unplug the harness, remove the retaining bolt, ease the sensor out, lightly oil the O-ring on the new one, seat it squarely, and tighten to the factory torque. Because tolerances matter, they should follow the Subaru service manual for torque specs and re-learn procedures. After fitting, clear codes and road test, if a code returns, the shop will typically scope the signal and check loom integrity end-to-end.

As part of regular servicing, it’s sensible to keep an eye out for oil leaks near the sensor, secure the harness clips, and scan for stored crank-related codes every 10,000–15,000 kilometres. A little preventative attention here helps the Legacy start first pop and run sweet as.

• Common symptoms: hard start/no start, random stalling, misfire feel, check engine light (P0335–P0339)
• Quick care tips: keep connector clean and tight, fix nearby oil leaks, inspect wiring for rub-through

Popular questions

Where is the crank angle sensor on a 2015 Subaru Legacy?
It’s mounted to the engine block where it can “see” the crankshaft’s trigger wheel. On the four-cylinder FB25 it’s typically accessed near the rear/side of the block, while on the six-cylinder EZ36D access differs slightly around the front cover area. A torch and a small spanner help, and the workshop manual pinpoints the exact spot for each engine.

What are the signs the crank angle sensor is failing?
Common signs include long cranking, intermittent stalling, a sudden loss of power with the tach dropping to zero, and the check engine light with codes like P0335. Because wiring issues can mimic sensor faults, it’s smart to check the connector and loom before replacing the sensor.

Can the sensor be cleaned, or does it need replacing?
If contamination is light, a careful clean of the tip and connector can restore a good signal. If there’s internal failure, heat damage, or persistent crank sensor codes after checks, replacement is the reliable fix. Always use quality parts and follow the factory torque and re-learn steps.