Parts for your 2014 Subaru Legacy-Crank angle sensor

2014 Subaru Legacy crank-angle-sensor: what it does and how to look after it

Based on the Subaru Factory Service Manual for 2014MY Legacy/Outback (Engine/Diagnostics), the Subaru Technical Information System (STIS), and Subaru’s genuine parts catalogue references for FB25 and EZ36 engines, the 2014 Subaru Legacy is fitted with a crankshaft position sensor—commonly called a crank‑angle sensor. It’s a core engine management input and absolutely relevant to this model.

This little sensor keeps the engine’s timing on point. It reads the crankshaft’s position and speed from a toothed wheel and feeds that to the ECU. From there, the ECU decides when to spark the plugs and when to fire the injectors, and it also uses the signal for misfire detection and to sync with the cam sensors. If the signal drops out, the Legacy can crank but not start, or it may cut out unexpectedly—so it’s a bigger deal than its size suggests.

There’s no scheduled replacement interval for the crank‑angle sensor on a 2014 Legacy, it’s a sealed Hall‑effect unit designed to be maintenance‑free. During regular servicing, it’s sensible to give its harness and connector a once‑over—look for brittle wiring, oil contamination, or a loose plug. Keeping nearby oil leaks under control helps protect the connector and O‑ring from swelling or poor contact.

• Typical symptoms of trouble include: long cranking or no start, intermittent stalling, rough running, the tacho dropping out, and a Check Engine Light with codes like P0335/P0338.
• Handy checks: verify clean, tight connector pins, inspect the sensor body for damage, confirm the harness isn’t rubbing on the timing cover or exhaust, use a scan tool to confirm stable RPM during cranking.

When replacement is needed, stick with a quality OEM‑spec sensor. Disconnect the battery, unplug the connector, remove the single retaining bolt, and withdraw the sensor carefully so the O‑ring isn’t torn. Lightly lube the new O‑ring, seat the sensor fully, route the harness as per factory clips, and tighten to the workshop spec. Clear any stored fault codes, then start and check for a steady idle and clean RPM pickup. On these Subarus there’s usually no manual relearn required—the ECU will sync itself after start‑up.

Owners who do higher‑kilometre touring across Aussie or NZ conditions might add an occasional visual check of the sensor area to their service routine. It’s cheap insurance against a no‑start miles from home.

Popular questions

Where is the crank‑angle sensor on a 2014 Subaru Legacy?
It’s mounted to the engine block, reading a tone wheel on the crankshaft. On the 2.5‑litre FB engine it’s accessed with basic hand tools, removing the intake ducting can improve access. The 3.6‑litre layout is similar, though access can vary—many techs prefer getting at it from above with good lighting.

Does the crank‑angle sensor need regular servicing?
No scheduled service is required. It’s considered a lifetime, sealed sensor. During routine services, checking the connector for oil, moisture or looseness is worthwhile, and fixing any nearby oil seepage helps the sensor live a long, drama‑free life.

Is it safe to drive with a failing crank‑angle sensor?
Not really. A weak or intermittent signal can cause sudden stalling or a no‑start after a short stop. If the Legacy shows P0335‑type faults or stalls unexpectedly, it’s best to get it diagnosed promptly and consider a tow rather than risk being stranded.