Parts for your 2002 Subaru Forester-Crank angle sensor

2002 Subaru Forester crank angle sensor (crankshaft position sensor)

Technical sources confirm the 2002 Subaru Forester is fitted with a crank angle sensor. Subaru labels it the crankshaft position sensor (CKP) in the Factory Service Manual for MY02 Forester (EJ-series engine), and it’s shown in the official wiring diagrams and parts catalogue as a two‑pin sensor feeding the ECU. Same part, different name — it tracks crank angle and speed so the ECU can fire the coils and time the fuel precisely.

On a 2002 Forester, the crank angle sensor sits at the top rear of the engine block under the bonnet, near the bellhousing, reading a toothed wheel on the crank. Its job is to report exact crankshaft position and RPM so the ECU can run sequential injection, control ignition timing, and detect misfires. When it goes out of whack, drivers may notice hard starting, random stalling (often when hot), rough idle, hesitation, a dead tach for a moment, or a check engine light with codes like P0335.

This isn’t a normal “replace by kilometres” item, it’s serviced on condition. During routine servicing, it’s worth giving the connector a quick look: check for brittle wiring, oil contamination, or heat damage from the exhaust. Because it’s a fixed-mount design, there’s no adjustable gap — the usual check is sensor resistance against the Subaru spec and a visual on the reluctor wheel if the gearbox is out.

If replacement is needed, it’s a straightforward driveway job with basic tools:

• Let the engine cool, disconnect the battery, and remove intake bits as needed for access.
• Unplug the two‑pin connector, undo the single 10 mm retaining bolt, and ease the sensor out.
• Lightly oil the new O‑ring, seat the new sensor squarely, and torque the bolt to factory spec (around 8 N·m for the M6 fastener).
• Reconnect, clear codes, and let the ECU relearn with a few normal drives.

Using a genuine or high‑quality aftermarket CKP sensor avoids flaky signals that can cause intermittent no‑start headaches. If the Forester is showing sporadic cut‑outs, especially once warm, or logging P0335/P0339, sorting the crank angle sensor sooner rather than later can save an embarrassing non‑start at the servo.

Popular questions

Where is the crank angle sensor on a 2002 Subaru Forester?
It’s mounted at the top rear of the EJ engine, near the bellhousing, roughly below the throttle body area. Most techs access it from above under the bonnet, remove the intake snorkel for a clearer path to the single 10 mm bolt and two‑pin plug.

Does the crank angle sensor need regular servicing or scheduled replacement?
No set interval. It’s inspected during normal servicing for wiring condition and connector cleanliness, then replaced only if faulty. Many last well past 200,000 kilometres, heat, oil contamination, or harness damage are the usual reasons they fail.

Is it safe to keep driving with a failing crank angle sensor?
Not really. A marginal sensor can cause sudden stalling or a no‑start, which isn’t ideal in traffic or out bush. If the Forester’s logging P0335 or showing intermittent cut‑outs, plan a replacement promptly.