Parts for your 2020 Mitsubishi Eclipse cross-Map sensor

2020 Mitsubishi Eclipse Cross MAP sensor — what it does and how to look after it

The 2020 Mitsubishi Eclipse Cross (1.5‑litre MIVEC turbo petrol, engine code 4B40) is fitted with a MAP (manifold absolute pressure) sensor. This is documented in Mitsubishi Motors’ factory Service Manual for Eclipse Cross (Engine/MFI sections list the Manifold Absolute Pressure sensor and related DTCs P0106, P0107, P0108), and it’s also shown as a serviceable item in Mitsubishi’s ASA/EPC parts catalogue for the 4B40 intake system. OBD‑II diagnostics for this model likewise include MAP sensor monitoring and fault logic.

On this turbocharged Eclipse Cross, the MAP sensor measures pressure inside the intake manifold — from vacuum at idle to positive boost on throttle. The ECU blends this signal with intake air temperature and engine speed to nail fuelling, ignition timing and boost control. It’s also how the car automatically compensates for altitude when heading over the ranges. When the MAP reading is off, the ECU can’t judge engine load properly, which shows up as rough idle, doughy acceleration or higher fuel use.

There’s no set replacement interval in the service schedule, it’s more of a “inspect and replace if needed” item. Still, it pays to keep things tidy under the bonnet:

• Watch for tell‑tales: check‑engine light, codes P0106–P0108, hard starting, rich running or poor economy.
• Keep the intake tract clean, oil mist from the PCV system can gum up ports over time.
• If removing the sensor, use electronics‑safe cleaner only — don’t poke the sensing port with wire or a pick.
• Inspect the connector for green crusties, pin tension and broken locks, check the O‑ring for nicks and replace if flattened.
• With a scan tool, a healthy sensor shows about ambient barometric pressure KOEO (~100 kPa at sea level) and ~30–45 kPa at hot idle.

When replacement is on the cards, a quality OEM‑equivalent is the go. Under the bonnet it’s a simple unbolt/unplug job on the manifold, but follow torque specs and procedures in the Mitsubishi Service Manual, and clear codes after fitting. If the car’s been tuned or is throwing multiple airflow‑related codes, it’s smart to rule out vacuum leaks or a split charge hose before condemning the MAP. Sorted correctly, the MAP sensor helps the Eclipse Cross stay punchy, efficient and compliant with emissions across Aussie and Kiwi conditions.

Popular questions

Where is the MAP sensor on a 2020 Eclipse Cross?

It’s mounted on the intake manifold, near the throttle body. You’ll see a small, rectangular sensor with a plug and an O‑ring seal into the manifold. Some variants also have a separate boost/charge‑pressure sensor in the intercooler piping, but the MAP sensor itself reads manifold pressure.

Can the MAP sensor be cleaned, or should it be replaced?

Light contamination can often be cleaned with electronics‑safe spray and a gentle touch. If the sensor is oil‑soaked inside, damaged, or keeps logging P0106/P0107/P0108 after checks for leaks and wiring faults, replacement is the reliable fix.

What symptoms point to a faulty MAP sensor?

Common signs include a check‑engine light, rough idle, sluggish throttle response, poor fuel economy and black smoke on boost. Scan tool data that doesn’t track barometric pressure with KOEO or shows erratic kPa readings at steady idle also suggests a MAP fault.