Parts for your 2018 Mitsubishi Eclipse cross-Map sensor

2018 Mitsubishi Eclipse Cross MAP sensor: what it does and how to look after it

Technical sources confirm the 2018 Mitsubishi Eclipse Cross is fitted with a MAP (Manifold Absolute Pressure) sensor. The Mitsubishi Motors Factory Service Manual for the Eclipse Cross (GK, 4B40 1.5T) identifies a MAP/Boost Pressure Sensor used for load and boost control, the Mitsubishi ASA electronic parts catalogue lists an “Absolute Pressure” sensor for GK1W, and the model’s diagnostics include MAP-related DTCs P0106, P0107, and P0108. So yes—this part is relevant and used on the 2018 Eclipse Cross.

On the Eclipse Cross, the MAP sensor measures the air pressure in the intake (vacuum at idle and cruise, boost under throttle on the 1.5‑litre turbo). The ECU leans on that signal to work out engine load, fine‑tune fuel delivery and ignition timing, and manage turbo boost. When the MAP reading is on the money, the car feels crisp, starts cleanly, and sips fuel the way it should. When it’s off, it can feel doughy, drink more petrol, or log a check‑engine light.

There’s no set replacement interval in normal servicing. Instead, good practice is to inspect the sensor and its connector at major services (every 20,000 km or so), especially if the car sees dusty roads. Look for split or oil‑soaked hoses, loose clamps on the charge pipes, and a damaged O‑ring at the sensor. If contamination is visible, a light mist of quality electronics cleaner on the sensor port is usually all that’s needed—avoid harsh solvents and don’t poke the sensing element.

If the car throws MAP‑related codes (P0106–P0108) or shows the tell‑tale signs below, testing is the go. A scan tool should show manifold pressure changing smoothly with throttle, any flat spots or wildly implausible readings point to a faulty sensor, wiring issue, or a boost/vacuum leak. Replacement is straightforward: depressurise the intake (engine off), unplug, remove the retaining screw(s), swap the O‑ring if supplied, install and torque snugly, reconnect, clear codes, then perform an idle relearn. Sticking with a quality OEM‑spec sensor keeps boost control and drivability right where they should be.

• Common symptoms: hard starting, rough idle, sluggish acceleration, poor fuel economy, surging under boost, and a check‑engine light.
• Handy tip: after any intake work, double‑check every hose and clamp under the bonnet—leaks can mimic a bad MAP.

FAQs

Where is the MAP sensor on a 2018 Eclipse Cross?
It’s mounted on the intake side—typically on the intake manifold or charge pipe near the throttle body on the 1.5‑litre turbo. Under the bonnet, look for a small black sensor with a two‑ or three‑pin connector and a single retaining bolt.

Does the MAP sensor need routine cleaning?
Not routinely. If performance drops or a fault code appears, a quick inspection and a gentle clean with electronics cleaner is fine. If readings are erratic or there’s moisture/oil intrusion, replacement is usually the better bet.

What causes MAP sensor faults on the Eclipse Cross?
Common culprits are boost/vacuum leaks, oil mist contamination, a damaged O‑ring, or wiring/connectors getting loose. Less often, the sensor itself fails with age or heat cycling.