Parts for your 2015 Mitsubishi Asx-Maf sensor

2015 Mitsubishi ASX MAF Sensor — what it does and how to look after it

Based on technical references including the Mitsubishi Motors ASX/RVR/Outlander Sport workshop manual (2015, Group 13A – Engine Electrical: Mass Air Flow Sensor), the Mitsubishi ASA electronic parts catalogue for GA-series ASX models, and common aftermarket catalogues used in AU/NZ parts counters, the 2015 Mitsubishi ASX is fitted with a Mass Air Flow (MAF) sensor on both the 2.0‑litre petrol and diesel variants of that era. The sensor mounts in the intake duct just downstream of the air filter housing and is integrated into the engine’s MFI (multi‑point fuel injection) control strategy.

On a 2015 ASX, the MAF sensor measures the actual mass of air drawn into the engine so the ECU can meter fuel precisely. That real‑time airflow signal helps the car hit good fuel economy around town and keeps throttle response smooth on the open road. It also supports ignition timing, EGR management (especially on diesels), and emissions control so it passes a WOF or rego check without drama.

When the MAF gets dirty or drifts out of spec, drivers may notice rough idle, flat spots, higher fuel use, a check‑engine light, or codes like P0100–P0104. Because the ASX relies on accurate airflow data, keeping the sensor clean and the intake airtight makes a noticeable difference to drivability.

• Service tips:
  • Inspect the intake tract at each service: airbox sealed, duct clamps snug, no cracks after the air filter.
  • If cleaning is needed, only use a dedicated MAF cleaner. Don’t touch the sensing element and avoid general brake/contact cleaners.
  • Avoid heavily oiled aftermarket filters, excess oil can contaminate the hot‑film element.
  • There’s no fixed replacement interval—replace on failure, contamination, or confirmed bad readings.
• Basic replacement guidance:
  • Key off, disconnect the plug, undo the retaining screws, and lift the sensor straight out. Swap the O‑ring if supplied.
  • Refit carefully, torque the fasteners lightly, reconnect, and clear fault codes and fuel trims with a scan tool. An idle relearn may be required after battery/ECU resets.

Good practice for Aussie and Kiwi conditions: check the air filter more often if driving on dusty gravel or coastal roads, and keep an eye out for aftermarket snorkels or intake mods that could skew the MAF reading. If in doubt, a quick live‑data check on a scan tool while idling and at 2,500 rpm will confirm if the sensor’s reporting sensibly for the engine size.

Popular questions about the 2015 Mitsubishi ASX MAF sensor

Where is the MAF sensor on a 2015 ASX?

It sits in the intake duct just after the air filter housing under the bonnet. Look for a small rectangular sensor body with a wiring plug and two mounting screws. It reads the air passing from the filter into the engine.

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

Light contamination can often be sorted with a proper MAF cleaner spray. If cleaning doesn’t restore smooth running or the ECU keeps logging MAF faults, replacement is the smarter, longer‑term fix. Always avoid touching the sensing element.

Does the ASX use a MAP sensor as well?

Yes, many ASX variants also use a MAP sensor. The ECU blends inputs from both sensors for accurate load calculation, especially under rapid throttle changes or, on diesels, when managing boost and EGR. That’s normal and by design.