Parts for your 2011 Mitsubishi Lancer-Map sensor

2011 Mitsubishi Lancer MAP sensor: what’s fitted and what matters

Technical sources including the Mitsubishi Motors CJ Lancer (2011 MY) Service Manual – Engine Control (Group 13A), Mitsubishi ASA electronic parts catalogue, and AlldataDIY model coverage show that a manifold absolute pressure (MAP) sensor is not fitted on the naturally aspirated 2011 Lancer models (4B11 2.0L and 4B12 2.4L). Those trims run a mass air flow (MAF) sensor with intake air temperature, while barometric pressure is handled within the ECU. By contrast, the turbocharged 2011 Lancer Ralliart and Evolution X (4B11T) do use a MAP/boost pressure sensor on the intake manifold, as also reflected in Bosch application listings for 4B11T engines.

Why no MAP sensor on the non‑turbo Lancer? The factory strategy is MAF‑based load calculation, which measures incoming air directly and delivers excellent drivability and emissions control without needing manifold pressure data. With stable vacuum characteristics and no boost, the ECU doesn’t require a dedicated MAP sensor for fuel and spark, so it simply isn’t fitted.

For 2011 Lancer Ralliart and Evolution X owners, the MAP (manifold absolute pressure) sensor is essential to how the car runs. Mounted on the intake manifold and exposed to boost, it tells the ECU exactly what pressure the engine is seeing, so the ECU can nail fuelling, ignition timing, and boost control via the wastegate. Working alongside the MAF, it keeps response tidy from school run to spirited weekend drives, even as altitude and weather swing across Aussie and Kiwi roads.

There’s no set service interval for the MAP sensor, but it appreciates a check during regular servicing. Under the bonnet, make sure the electrical connector is clean and firmly latched, and look for oil mist or greenish corrosion. If the sensor seals with a small O‑ring, replace the O‑ring rather than reusing a squashed one. On variants that use a short hose to the sensor, confirm the hose isn’t split, soft, or oily inside.

Common warning signs of MAP sensor or plumbing issues include dull throttle response, an iffy idle after heat soak, thirstier fuel use, and fault codes like P0106/P0107/P0108 or turbo underboost. If the ECU can’t trust pressure readings, it may limit power to protect the engine.

Replacement is a straightforward spanner job: disconnect the battery, unplug the connector, remove the retaining screws, lift the sensor, fit a fresh O‑ring, and refit gently. Choose a quality OE‑equivalent sensor—cheap copies often drift and cause lean running or boost control grief. After refitting, clear codes and perform an idle relearn with a scan tool if available. While it’s not a scheduled item, giving the sensor and hoses a once‑over every 20,000–30,000 km (alongside air filter and intercooler hose checks) keeps the Lancer feeling sharp. Keeping the PCV system healthy also reduces oily vapour that can foul the sensor port.

• Applies: 2011 Lancer Ralliart/Evolution X (MAP fitted), 2011 Lancer 2.0/2.4 NA models (no MAP fitted).

Popular questions

Does my non‑turbo 2011 Lancer have a MAP sensor?
On the 2.0L and 2.4L naturally aspirated models, no. They use a MAF sensor for load calculation and the ECU handles barometric pressure internally, so there’s no manifold‑mounted pressure sensor to replace. If you pop the bonnet and don’t see a small pressure sensor on the manifold with a 3‑pin plug, that’s perfectly normal for these trims.

Where is the MAP sensor on a 2011 Lancer Ralliart or Evo X?
It sits on the intake manifold near the throttle body, with a 3‑pin electrical plug and a small O‑ring seal. Some setups reference pressure directly in the manifold, others use a short hose from the manifold. If you’re chasing it, trace from the throttle body area—don’t confuse it with the MAF on the airbox snorkel.

Should the MAP sensor be cleaned or just replaced?
There’s no routine cleaning required. If oil vapour has contaminated the port, a gentle electronics‑safe cleaner can help, but avoid aggressive sprays. If the sensor is throwing codes or readings are unstable, replacement with an OE‑quality unit is the go. Always renew the O‑ring and check nearby hoses and connectors at the same time.