Parts for your 2016 Subaru Xv-Camshaft sensor

2016 Subaru XV camshaft sensor: what it does and when to sort it

Yes, the 2016 Subaru XV (Crosstrek) is fitted with camshaft position sensors. Technical references that confirm this include the Subaru service manual for the 2016 XV/Crosstrek (FB20 engine) under Engine Diagnostics, which lists DTCs such as P0340 and P0341 for the camshaft position sensor circuit, and the Subaru parts catalogue, which shows camshaft position sensors fitted to the FB20 engine’s cylinder heads. These sources make it clear the sensor is both relevant and essential on this model.

On the XV’s 2.0‑litre FB20 boxer, the camshaft sensor helps the ECU pinpoint the exact position and timing of the cam(s). That lets the engine run sequential fuel injection and control Subaru’s AVCS (variable valve timing) properly. When the sensor plays up, the ECU can’t trust timing data, so it may default to a safe map—cue sluggish performance, rough idle, longer cranking, higher fuel use, and a glowing Check Engine Light.

It’s not a routine replacement item, but it is smart to keep an eye on it during regular servicing. Under the bonnet, the sensors live at the ends of the cylinder heads, they’re small, sealed, and held in with a single bolt. Over many kilometres, heat and oil vapour can make connectors brittle or allow a slight oil weep past the O‑ring. A quick visual once-over during a service—checking the plug, wiring loom, and any signs of oil at the sensor body—goes a long way.

If the XV throws a cam sensor code or shows the classic symptoms, don’t just parts-cannon it. Step through proper diagnosis: scan for DTCs, verify live data, and inspect the connector and loom for damage or oil ingress. If the sensor is confirmed faulty, replacement is straightforward for a competent DIYer or workshop: disconnect the battery negative, unplug the connector, remove the retaining bolt, twist the sensor out, lightly oil a new O‑ring, and refit. Always use quality OEM‑spec parts, and take care routing the loom clear of hot or moving bits. After refitting, clear codes and confirm timing data and AVCS response with a scan tool. Done right, the XV should crank quicker, idle smoother, and feel perkier off the line.

• Typical signs of trouble: hard starting, misfires/rough idle, flat spots, higher fuel consumption, Check Engine Light with P0340/P0341.
• Good service habit: inspect connectors and O‑rings during scheduled services, fix oil leaks that could contaminate plugs.

FAQ: Where is the camshaft sensor on a 2016 Subaru XV?

On the FB20 engine, cam sensors are mounted on the cylinder heads. Look near the end of the head—small sensor with a single bolt and an electrical plug. Access varies slightly by side, a cool engine and good lighting help.

FAQ: Can a bad camshaft sensor damage the engine if driven?

It usually won’t cause immediate mechanical damage, but driving with a faulty sensor can lead to poor running, stalling, and higher fuel use. It should be diagnosed and fixed promptly to avoid being stranded and to keep AVCS and emissions in check.

FAQ: Do both camshaft sensors need replacing at the same time?

Not necessarily. Replace the faulty one that testing identifies. That said, on high‑kilometre cars, if one has failed and the other is original, proactive replacement can be sensible—use OEM‑quality parts and verify with a scan tool after.