Parts for your 2020 Subaru Outback-Camshaft sensor

2020 Subaru Outback Camshaft Sensor: What It Does, Where It Lives, and When to Replace It

Based on Subaru factory service information and parts catalogues for the 2020 Outback (BT), including the Engine (Diagnostics) sections of the Subaru Service Manual and Subaru’s Dual AVCS technical training notes, the vehicle is absolutely fitted with camshaft position sensors. The 2.5‑litre FB25 engine uses two sensors (one on each cylinder head monitoring the intake cams), while the 2.4‑litre turbo FA24 engine in XT models uses four sensors (intake and exhaust on both banks). These same technical sources list related DTCs such as P0340/P0341/P0345/P0346 for camshaft position sensor circuits, confirming their role in engine management.

On this Outback, the camshaft sensor feeds the ECU with the exact position and timing of the camshaft(s). That live data is matched with the crank sensor so the ECU can control fuel injection, ignition timing and Subaru’s AVCS (variable valve timing) with precision. The result is smoother starts, better low‑down torque, cleaner emissions and dependable fuel economy on long Kiwi or Aussie road trips.

There’s no set replacement interval in the Subaru maintenance schedule, the sensors are designed to last the life of the engine. They’re only replaced if faulty or damaged. Typical signs a sensor is playing up include hard starting, intermittent stalling, rough idle, sluggish performance, sudden fuel use spikes, or the check engine light with DTCs like P0340 or P0345. Before swapping parts, a proper diagnosis should include a scan for codes and live data, a visual check of the connector and loom under the bonnet, and confirmation of a clean cam signal.

When replacement is needed, use a genuine or high‑quality equivalent sensor matched to the engine code (FB25 or FA24). Always:

• Disconnect the battery and allow the engine to cool.
• Inspect the connector for oil ingress or corrosion and repair the loom if chafed.
• Lightly oil the new O‑ring, seat the sensor squarely, and tighten to the factory spec—don’t overtighten.
• Clear fault codes, then perform a road test so the ECU can relearn idle and timing behaviour.

As part of regular servicing, it’s smart to keep an eye on the sensor areas for minor oil leaks, ensure connectors are snug and clean, and address any cam/crank correlation codes promptly. Looked after this way, the Outback’s cam sensors help the petrol boxer hum along reliably for many kilometres.

Popular questions

Does the 2020 Subaru Outback have a camshaft sensor, and how many?
Yes. All 2020 Outback models have camshaft position sensors. The 2.5L FB25 has two (one per cylinder head, monitoring the intake cams). The 2.4L turbo FA24 (XT) has four—intake and exhaust on both banks to support Dual AVCS.

Where is the camshaft sensor located on a 2020 Outback?
They’re mounted at the front of the cylinder heads. On FB25 models you’ll find one sensor on each head near the intake cam sprocket. On FA24 models there’s an extra pair for the exhaust cams. Access is under the bonnet, some trims may need minor cover removal for a clear path.

Do camshaft sensors need routine replacement?
No. There’s no scheduled replacement—only change a sensor if it’s faulty. During services, check for oil seepage, secure connectors, and any stored cam/crank correlation codes. If replacement is required, fit the correct sensor for the engine variant and clear the codes after installation.