Parts for your 2007 Mitsubishi Lancer-Map sensor

2007 Mitsubishi Lancer MAP Sensor: what it does, where it is, and how to look after it

Based on Mitsubishi’s own technical literature, a MAP (Manifold Absolute Pressure) sensor is used on 2007 Lancer models. The CH-series workshop manual (2002–2007) details the MAP sensor as part of the engine control system on 4G94/4G69 engines, and the early CJ-series service information (2007 build, MY08 in AU/NZ) lists a manifold pressure sensor used alongside a MAF on 4B11 engines. Mitsubishi’s ASA/CAPS parts catalogues also show a dedicated MAP sensor for these engines. So yes—this Lancer runs a MAP sensor, and it matters.

The MAP sensor’s job is to read intake manifold pressure so the ECU can calculate engine load. That lets the car fine‑tune fuel delivery, ignition timing, idle speed control, and even barometric corrections when climbing alpine passes. On turbo variants (like Evo models), a pressure sensor also keeps tabs on boost, but the everyday CH and early CJ Lancers rely on MAP data to keep the drive smooth and fuel use in check.

When a MAP sensor goes out of whack, they’ll often notice rough idle, flat spots, higher fuel consumption, or the MIL glowing with codes like P0105–P0108. Because it’s a solid‑state part, there’s no fixed replacement interval. Instead, think of it as an “inspect and keep clean” item during servicing.

• Location: typically mounted on the intake manifold (near the throttle body on CH 4G94/4G69, on the upper plenum on early CJ 4B11), with a small three‑pin plug and an O‑ring seal.
• Care: a quick check each service for oil vapour build‑up and a gentle spray with electronics‑safe cleaner is plenty. Don’t poke the sensing port, and make sure the O‑ring isn’t split.
• Wiring: under the bonnet heat can make connectors brittle—look for green corrosion, loose pins, or chafed loom tape.

Replacement is straightforward: disconnect the battery, unplug the connector, remove the retaining screws, swap the sensor and O‑ring, refit, clear any codes, then do an idle relearn (let it idle with all accessories off for several minutes). Using a good‑quality OE‑equivalent sensor helps avoid niggly drivability gremlins. For CH cars that use speed‑density (MAP‑based) as the primary load input, a healthy MAP sensor is critical, for early CJ with both MAF and MAP, the MAP still plays a big role in transient fuelling and diagnostics.

Popular questions about 2007 Mitsubishi Lancer MAP sensors

Where is the MAP sensor on a 2007 Lancer?
On CH models (4G94/4G69), it’s bolted to the intake manifold near the throttle body with a three‑pin plug. On early CJ (4B11), look on the upper manifold plenum. It’s compact, usually held by two screws, with an O‑ring sealing it to the manifold.

What are the signs a MAP sensor is failing?
Common clues include rough idle, hesitant take‑off, higher fuel use, black smoke on hard throttle, and the check‑engine light. Scan tools may show codes P0105–P0108. Always rule out vacuum leaks and wiring issues before blaming the sensor.

Can the MAP sensor be cleaned instead of replaced?
Often, yes. If it’s just oily vapour fouling, a light spray with electronics‑safe cleaner can restore readings. If there’s internal fault data or it won’t hold plausibility under load, replacement is the go. Check the O‑ring and connector while you’re there.