Parts for your 2014 Subaru Forester-Map sensor

2014 Subaru Forester MAP sensor — what it does and how to look after it

Technical sources confirm the 2014 Subaru Forester (SJ) does use a MAP sensor. Subaru’s 2014MY Forester service manual (Engine Control), the Subaru Technical Information System DTC list (P0106–P0108: Manifold Absolute Pressure/Barometric Pressure faults), and the Subaru parts catalogue for the SJ Forester all identify a dedicated Manifold Absolute Pressure sensor on both the 2.5i (FB25) and 2.0XT (FA20DIT) engines. On the turbocharged XT, it’s also integral to boost control.

The MAP sensor’s job is to read absolute pressure in the intake manifold so the engine control module can figure out engine load. That information is blended with airflow and temperature data to set fuel delivery, ignition timing, and—on the XT—turbo boost targets. It keeps things tidy across Aussie and Kiwi conditions, from sea level to alpine passes, making sure the Forester starts cleanly, idles smoothly, and doesn’t chew through extra fuel.

There’s no fixed replacement interval for the MAP sensor, but it deserves a look during major servicing. Under the bonnet, it’s mounted to the intake manifold with a sealed O‑ring. If crankcase vapours or dust have left a film on the sensing port, a gentle clean with electronics-safe cleaner (no picking or poking the port) can restore accurate readings. Always let it dry fully and avoid blasting with compressed air. If the O‑ring looks flattened or perished, replace it to prevent vacuum leaks.

When a MAP sensor is on the fritz, the Forester can feel doughy, use more fuel, or throw a check engine light. Common codes include P0106, P0107, and P0108. Before blaming the sensor, check basics: intact harness and plug, no split hoses or manifold leaks, and a healthy air filter. If replacement is needed, disconnect the connector, remove the retaining screws, swap in a quality unit, fit a fresh O‑ring, and nip the screws to factory spec. A battery reset or code clear helps the ECU settle in. For the 2.0XT, a flaky MAP can trigger limp mode, so sorting it promptly saves headaches.

• Typical clues: rough idle, hesitation, poor economy, sootier exhaust, and MAP-related DTCs.
• Best practice: inspect at major services (around 60,000 km), keep the intake sealed, and use quality filters.

Popular questions

Where is the MAP sensor on a 2014 Subaru Forester?
It’s fitted to the intake manifold. On FB25 models it’s a small sensor with an electrical plug and O‑ring seal, on FA20DIT (XT) it plays a key role in boost control along with other pressure sensors in the charge system.

What are the signs of a failing MAP sensor?
Expect a check engine light (often P0106–P0108), rough idle, flat spots on acceleration, higher fuel use, or blacker exhaust. Turbo XT models may limit boost and feel noticeably down on power.

Does the 2014 Forester use both MAF and MAP sensors?
Yes. Subaru uses a MAF for measured airflow and a MAP for manifold pressure/load. Together they sharpen fueling, timing, altitude compensation, and—on the XT—boost management.