Parts for your 2006 Subaru Outback-Camshaft sensor

2006 Subaru Outback camshaft sensor — what it does, where it lives, and when to replace it

Based on Subaru technical literature, the 2006 Subaru Outback does use one or more camshaft position sensors (CMP). The Subaru Factory Service Manual (Subaru STIS, Legacy/Outback 2005–2009) lists the CMP and related diagnostics (DTCs P0340–P0349) across the EJ253 2.5i, EJ255 2.5 turbo, and EZ30R 3.0 H6 engines. The Subaru parts catalogue for these models also lists the camshaft position sensor as a serviceable item, and workshop references such as Haynes Legacy/Outback 2000–2009 cover test and replacement procedures. In short: the 2006 Outback is fitted with cam sensors—one on the 2.5i SOHC, two on the 2.5 turbo (one per bank), and typically two on the 3.0 H6 (one per bank).

On this Outback, the camshaft sensor lets the ECU know exactly where each cam is in its rotation. That timing info is crucial for quick starts, smooth idle, accurate sequential fuel injection and spark, and for engines with variable valve timing (AVCS), keeping the cam phasing on point. Lose that signal and the ECU has to guess using only the crank sensor, which can mean long cranking, rough running, limp behaviour, and a glowing check engine light.

It’s not a scheduled replacement item, but it does live in a hot, oily environment under the bonnet. Over time, heat cycling, oil wicking through the connector, or a tired O-ring can cause trouble. If the dash throws codes like P0340/P0341/P0345 or it’s hard to start when hot, it’s time to inspect the sensor and its wiring.

Replacement is straightforward for a competent DIYer. Disconnect the battery, find the sensor on the cylinder head (2.5i: single sensor on the left-hand head, 2.5 turbo and 3.0 H6: one per bank), unplug it, remove the retaining bolt, swap the sensor and O-ring, then refit and torque the bolt to specification (around 8–9 N·m—confirm for the exact engine in the factory manual). A light smear of clean engine oil on the new O-ring helps it seat without pinching. Clear the codes and road test.

Good practice is to use genuine or high-quality OEM-equivalent sensors, keep the connector clean and clipped firmly, and check nearby harness routing so it’s not rubbing or getting cooked. If a cam sensor code appears alongside crank sensor or AVCS codes, test methodically—don’t just throw parts at it. A quick scope or multimeter check per the FSM can save a lot of guesswork.

• Common symptoms: extended cranking, misfires, rough idle, poor economy, stalling, and check engine light (P0340–P0349).
• Service tip: fix any rocker/valve cover oil leaks early—oil on the connector can cause intermittent faults.

Popular questions about 2006 Subaru Outback camshaft sensors

Where is the camshaft sensor on a 2006 Outback?

On the 2.5i SOHC, it’s typically on the left-hand cylinder head, accessible from the top with the engine cover off. The 2.5 turbo and 3.0 H6 have one sensor per bank, mounted on the front or upper area of each head under the plastic covers. A quick visual from above usually spots the small sensor with a single retaining bolt and a two- or three-pin connector.

Exact placement varies slightly by engine code, so it’s worth checking the engine label and a workshop diagram if access looks tight.

Is it safe to drive with a faulty camshaft sensor?

It might run, but it can be cranky—hard starts, poor throttle response, and the risk of stalling at the worst time. Prolonged misfires or rich running can also stress the catalytic converter. For safety and to avoid collateral damage, it’s best to repair sooner rather than later.

Do the cam and crank sensors need replacing together?

Not by default. They do different jobs and often fail independently. If diagnostics point squarely at the cam sensor (and the wiring checks out), replace just that. If both sensors are old and there are intermittent sync issues, some owners choose to refresh both as preventative maintenance, but proper testing comes first.