Parts for your 2020 Mitsubishi Asx-Map sensor

2020 Mitsubishi ASX MAP Sensor — What It Does and How to Look After It

Based on Mitsubishi’s factory service literature (RVR/ASX/Outlander Sport service manual, Group 13A – Engine Electrical), the Mitsubishi ASA electronic parts catalogue for GA/GM-series ASX (2019–2021), and Australian/NZ repair data and parts listings, the 2020 Mitsubishi ASX does use a Manifold Absolute Pressure (MAP) sensor on the petrol 2.0L (4B11) and 2.4L (4B12) engines. The MAP sensor is shown as a dedicated intake manifold-mounted sensor (commonly cross-referenced under Mitsubishi p/n in the 1865A2xx family) and is included in the engine control system alongside the throttle body and other sensors.

On the 2020 ASX, the MAP sensor helps the engine computer understand how much load the engine is under by measuring the absolute pressure inside the intake manifold. That live pressure reading, together with throttle position, intake temperature and crank/cam signals, lets the ECU sort out spark timing and fuelling so the ASX runs smoothly, uses less petrol, and keeps emissions in check. Even on non‑turbo ASX models, the MAP sensor is key for idle quality, cold starts, and cruise efficiency, and it also acts as a reference for on-board diagnostics.

For servicing, the MAP sensor is a low‑touch item, but it’s worth including a quick check at regular intervals. Oil vapour from the PCV system can film the sensor’s port over time, leading to sluggish readings. If there are symptoms like doughy throttle response, rough idle, higher-than-usual fuel use, or the check engine light with codes such as P0106–P0108, a MAP reading check with a scan tool is a smart first step. At key‑on/engine‑off, the sensor should read close to local barometric pressure, at hot idle, expect a healthy vacuum (lower kPa). Out‑of‑range values often point to a dirty sensor, vacuum leak, or wiring issue rather than a failed sensor.

• Location: Typically mounted on the intake manifold with a single bolt and an O‑ring seal.
• Inspection: Look for cracked connectors, chafed wiring, and oil contamination at the port.
• Cleaning: If lightly contaminated, remove and gently clean the tip with electronics‑safe sensor cleaner, avoid poking the sensing element.
• Replacement: Always fit a new O‑ring, seat the sensor squarely, and reconnect the harness until it clicks. Clear codes and verify live data and road-test.

Keeping the MAP sensor clean and the manifold airtight helps the ASX deliver consistent drivability and economy across Aussie and Kiwi conditions, from city hops to long country kilometres.

Popular questions

Where is the MAP sensor on a 2020 Mitsubishi ASX?
It’s mounted on the intake manifold, generally on the top or side facing the firewall, secured with a small bolt and sealed by an O‑ring. It has a two‑ or three‑pin electrical connector, depending on variant.

What fault codes point to a MAP sensor issue on the ASX?
Common codes include P0106 (MAP range/performance), P0107 (MAP circuit low), and P0108 (MAP circuit high). These can be triggered by a dirty port, wiring faults, vacuum leaks, or a failing sensor. Always confirm with live data before replacing parts.

Can the ASX run if the MAP sensor fails?
The engine may start and run in a limited or limp mode using fallback values, but drivability and fuel economy usually suffer. Extended driving with a dead or unplugged MAP sensor isn’t recommended, it’s best to diagnose and sort it promptly.