Parts for your 2012 Subaru Exiga-Camshaft sensor

2012 Subaru Exiga Camshaft Sensor — What It Does and When to Replace It

Technical documentation confirms the 2012 Subaru Exiga uses a camshaft position sensor. The Subaru Factory Service Manual for the YA-series (2012) includes diagnostics for camshaft position sensor circuits (e.g., DTCs like P0340/P0345), and the engine wiring diagrams show the camshaft sensor signal feeding the ECM. Subaru’s official parts catalogues for Exiga YA5/YA9 variants also list a camshaft position sensor as a serviceable component. These references cover both the naturally aspirated EJ-based engines and DOHC/AVCS variants used in Exiga markets.

On this model, the camshaft sensor’s job is to tell the engine computer exactly where the camshaft is in its rotation. That info is used to time fuel injection precisely, coordinate spark, and, on variable valve timing (AVCS) engines, keep the cam phasing where it should be. The result is smoother starts, better fuel economy, and clean emissions. When the sensor goes out of whack, the Exiga can be hard to start, run rough, or drop into limp mode, and it’ll usually log a fault code.

As part of regular servicing, it’s smart to keep an eye on the sensor and its plug. Heat and oil mist can harden the O-ring and make the connector brittle over time. A quick visual during oil changes goes a long way: check for oil weep at the sensor body, green corrosion on the pins, or a chafed loom near the timing cover and left strut tower. If the check engine light pops up with a cam sensor code, rule out basics first—battery condition and crank sensor signal—then inspect the cam sensor and wiring.

Replacement is a straightforward driveway job on most Exiga variants. Disconnect the battery, unplug the connector, remove the single hold-down bolt, twist the sensor gently to free the O-ring, and pull it out. Lightly oil the new O-ring, seat the new sensor, and refit the bolt to the factory torque spec. Clear codes and road test, no special relearn is typically required on EJ-based engines. Go genuine or a reputable OEM-equivalent sensor to avoid nuisance faults. On higher-kilometre cars, replacing the O-ring as preventative maintenance is cheap insurance against oil seep.

• Common signs it’s time: long cranking, intermittent stalling, flat spots, poor fuel economy, and DTCs like P0340/P0345.
• Best practice: inspect at each service, keep connectors clean and dry, and fix any loom chafe promptly.

FAQs

Where is the camshaft sensor on a 2012 Subaru Exiga?
On most EJ-powered Exiga models, it’s mounted at the timing-belt end of the left cylinder head, held by a single small bolt and sealed with an O-ring. Access is from the top of the engine bay, remove intake ducting if needed for room. Some DOHC/AVCS variants may have an additional sensor, so check by VIN if unsure.

What symptoms point to a failing camshaft sensor on this model?
Expect extended cranking, occasional stalling, rough idle, misfire-like hesitation, and the check engine light. The ECM may store cam sensor circuit or correlation codes. Because similar symptoms can come from a tired battery or crank sensor, a quick scan and basic electrical checks help confirm the culprit.

Do turbo or AVCS engines use more than one camshaft sensor?
Certain DOHC/AVCS configurations can use a sensor arrangement that differs from the naturally aspirated SOHC setup. Many NA variants use a single cam sensor, while some AVCS versions may employ additional sensing for cam phasing control. Always verify by engine code and VIN to order the correct part.