Parts for your 2010 Subaru Exiga-Map sensor

2010 Subaru Exiga MAP sensor — what it does and how to look after it

Based on technical sources such as the Subaru Factory Service Manual for the Exiga YA series (2010 MY, Engine Diagnostics — P0105–P0108 Manifold Absolute Pressure Sensor testing) and Subaru’s FAST electronic parts catalogue listing a “Pressure Sensor – Manifold” for 2010 Exiga petrol variants, the 2010 Subaru Exiga is fitted with a MAP sensor. On the 2.0GT turbo it also functions as the boost sensor. That makes the MAP sensor absolutely relevant to this model.

The MAP sensor measures absolute pressure inside the inlet manifold so the engine control unit can work out air density and true engine load. That information lets the ECU fine-tune fuelling, ignition timing and AVCS, keep idle tidy, and on turbo models, control boost and knock margins. Even on naturally aspirated Exiga engines that still use a MAF, the MAP sensor is used for transient load accuracy, altitude compensation, diagnostics and limp-home speed-density operation. Put simply, if the MAP signal is wrong, the Exiga can feel doughy off the line, surge on cruise, chew more fuel or throw a check engine light.

It’s typically mounted on the intake manifold near the throttle body (NA) or on the plenum under the intercooler piping (turbo), with a three-pin connector and an O-ring or short stub. During routine servicing it doesn’t need periodic replacement, but it’s smart to give it a quick once-over:

• Inspect the connector for green crust or loose pins, confirm a clean 5 V reference and a solid earth.
• Check the sensor port and manifold passage for oil mist build-up, clean gently with electronics-safe cleaner only.
• If there’s a vacuum hose style fitting, make sure the hose isn’t split, soft or blocked.
• On a scan tool, key-on/engine-off should read close to local barometric pressure, idling should show stable vacuum. Typical signal range is roughly 0.5–4.5 V across operating conditions.

Faulty or contaminated sensors can trigger codes like P0105–P0108 (MAP circuit faults) and, on turbo variants, P0236/P0237/P0238 (boost sensor range/performance). If replacement is needed, go with an OEM-spec unit so the calibration matches Subaru’s mapping, fit the new O‑ring, and ensure the mounting screws are snug without over-torquing the plastic housing. After refitting, clear codes and perform an idle relearn if required. Given Aussie and Kiwi conditions—from coastal humidity to alpine cold—checking the MAP sensor at major services helps keep the Exiga running crisp and economical.

FAQs

Does a 2010 Subaru Exiga have both a MAF and a MAP sensor?
Yes. Petrol Exiga variants run a MAF upstream and a MAP on the manifold. The MAF tracks incoming airflow, while the MAP gives real-time manifold pressure so the ECU nails transient load and, on the 2.0GT, controls boost. Using both improves drivability and fuel economy.

Where is the MAP sensor on a 2010 Exiga?
On naturally aspirated models it’s usually on or near the top of the intake manifold close to the throttle body. On the turbo 2.0GT it’s mounted on the manifold/plenum area under the top-mount intercooler piping. Look for a small, rectangular three-pin sensor with a single pressure port.

What fault codes point to a bad MAP sensor on an Exiga?
Common MAP/boost-related codes include P0105–P0108 for circuit and range issues. Turbo models may also log P0236–P0238 when the boost/pressure signal is out of range. If these appear with poor idle, flat spots or heavy fuel use, the MAP sensor and its wiring/port are prime suspects.