Parts for your 2016 Subaru Forester-Map sensor

2016 Subaru Forester MAP sensor — what it does and how to look after it

Yes, the 2016 Subaru Forester uses a MAP (Manifold Absolute Pressure) sensor. This is confirmed by Subaru’s own technical literature: the 2016MY Forester Service Manual lists diagnostics for the Manifold Absolute Pressure sensor (DTCs P0106–P0108) and the Subaru electronic parts catalogue includes a dedicated MAP sensor for both the FB25 (2.5L naturally aspirated) and FA20F (2.0L turbo) engines. Those factory sources make it clear the sensor is an integral part of the engine management on this model.

On the 2016 Forester, the MAP sensor reads pressure inside the intake manifold so the ECU can calculate engine load. That helps the car fuel accurately, manage ignition timing and, on turbo XT models, keep boost in check. Even on the non‑turbo FB25, the MAP signal is used along with the MAF sensor for fine control, altitude compensation, and reliable diagnostics.

As part of regular servicing, it’s smart to give the MAP sensor a quick once‑over. While it isn’t a high‑wear item, oil vapour and dust can skew readings over time.

• Inspection: Check the sensor body and connector on the intake manifold for cracks, corrosion or loose pins. Make sure the O‑ring is intact and seated properly.
• Hoses and leaks: Any split vacuum hose or manifold gasket leak will throw MAP readings off and can trigger a Check Engine Light with codes like P0106, P0107 or P0108.
• Cleaning: If contamination is visible on the port, use an electronics‑safe sensor cleaner only. Don’t poke the sensing element and don’t use aggressive solvents.
• Replacement: If the car shows rough idle, flat spots, poor fuel economy, hard starts, or repeated MAP‑related DTCs, replacement is usually the go. Use an OEM‑quality sensor, fit a fresh O‑ring, and clear codes with a scan tool. A short road test and a quick look at live MAP kPa versus barometric pressure at key‑on helps confirm it’s behaving.

Good practice for local conditions is to check MAP data during scheduled services (every 10–15,000 kilometres). Keeping the intake tract sealed, the PCV system healthy, and the air filter clean will help the MAP sensor report accurately and keep the Forester running sweet as.

Where is the MAP sensor on a 2016 Forester?

On FB25 models it’s mounted on the intake manifold near the throttle body, secured with small bolts and sealed by an O‑ring. On FA20F turbo models, it sits on the manifold where it can directly read boost and vacuum. Access is straightforward with basic hand tools.

What are the signs a MAP sensor is failing?

Common clues include a Check Engine Light (often P0106–P0108), rough idle, sluggish performance, higher fuel use, and occasional stalling. Because vacuum leaks mimic MAP faults, a smoke test or scan‑tool data check (MAP versus RPM and throttle) helps separate sensor issues from leaks.

Does the 2016 Forester use both MAF and MAP sensors?

It does. The MAF measures incoming air, while the MAP tracks manifold pressure. The ECU blends both signals for accurate fueling and timing, and on turbo models the MAP also keeps an eye on boost. If either sensor is off, drivability can suffer.