Parts for your 2022 Mitsubishi Asx-Maf sensor

2022 Mitsubishi ASX MAF Sensor — what it does, why it matters, and how to look after it

Yes, the 2022 Mitsubishi ASX is fitted with a mass air flow (MAF) sensor. This is confirmed by Mitsubishi’s factory workshop information for GA1W/GA2W ASX models, the Mitsubishi ASA electronic parts catalogue identifying an “air flow sensor” on the air cleaner outlet for 4B11/4B12 engines, and dealer/aftermarket parts catalogues used in Australia and New Zealand. OBD-II documentation for the ASX also references MAF-related DTCs (P0101–P0104), which further indicates the system’s use of a MAF sensor.

On the 2022 ASX, the MAF sensor is a hot-film unit that sits between the airbox and the intake hose. Its job is to measure the actual mass of air entering the engine so the ECU can deliver the right amount of fuel, manage ignition timing, and keep emissions tidy. Accurate air measurement helps the 2.0‑litre MIVEC engine start cleanly, idle smoothly, pull well through the mid-range, and maintain good fuel economy on Aussie and Kiwi roads.

As part of regular servicing, the MAF deserves a quick check. A clean, sealed intake is everything: even tiny dust leaks upstream can coat the sensing element and throw fuelling off. If the element is dirty, it’s usually fine to remove the sensor and clean it with a dedicated MAF cleaner (never brake or carb spray). Don’t touch the element with fingers or tools, let it dry fully, and refit carefully with the seal seated. Avoid over-oiled aftermarket filters, excess oil mist can contaminate the sensor.

When a MAF starts to play up, the ASX can run rich or lean, and the ECU may log a fault. If cleaning and confirming there are no intake leaks doesn’t sort it, replacement with the correct-spec sensor is the go. After fitting, some vehicles may need a short idle relearn or a few kilometres of mixed driving for trims to settle. Using a quality OEM-equivalent part will save headaches and keep the ASX running sweet.

• Common symptoms: rough idle, flat spots on take-off, poor fuel economy, black soot on tailpipe, check engine light (P0101–P0104).
• Service tips: keep the air filter fresh, ensure airbox clips and ducts seal properly, clean with proper MAF cleaner only, and check for split hoses or loose clamps.

Popular questions

Where is the MAF sensor on a 2022 Mitsubishi ASX?
It’s mounted on the outlet of the airbox, right before the intake hose to the throttle body. You’ll spot a small rectangular sensor body with an electrical connector and two fixing screws.

Can a dirty MAF cause poor fuel economy or CVT hesitation?
Absolutely. If the MAF under- or over-reports airflow, the ECU’s fuelling and load calculations go off, which can feel like sluggish response, hunting at light throttle, and extra fuel use.

Should the MAF be cleaned or just replaced?
Start with inspection and a proper MAF clean if it’s only lightly contaminated. If issues persist, there’s physical damage, or codes return quickly, replacement with a correct-spec sensor is recommended.