Parts for your 2002 Mitsubishi Pajero-Maf sensor

2002 Mitsubishi Pajero MAF Sensor — What It Does and How to Look After It

Yes, the 2002 Mitsubishi Pajero uses a mass air flow (MAF) sensor. Technical references including the Mitsubishi Motors NM/NP Pajero Workshop Manual (Engine Fuel/ECI-Multi and DI-D sections) and the Mitsubishi ASA electronic parts catalogue list an air flow sensor fitted on both the 3.5L 6G74 petrol and the 3.2L 4M41 DI-D diesel. It sits just after the airbox in the intake snorkel and feeds the ECU precise air-mass data.

The MAF’s job is to measure how much air the engine is breathing so the ECU can deliver the right amount of fuel. On the 3.2 DI-D it’s critical for smooth turbo response, emissions, and economy, on the 3.5 petrol it keeps cold starts crisp and throttle transitions clean. When a MAF under-reads, drivers can see lazy performance, higher fuel use, rough idle, soot on diesels, and a check engine light with codes like P0100–P0104. Over-reading can cause lean running and hesitation.

There’s no fixed replacement interval in the factory schedule, but the MAF should be inspected and cleaned as part of regular servicing. In Aussie and Kiwi conditions—dust, sea air, and the odd off-road trip—plan to:

• Check the air filter at every service, replace if dirty or oil-soaked.
• Inspect the intake for leaks after the MAF, splits cause false readings.
• Clean the MAF every 20,000–40,000 km with proper MAF cleaner only (no carb/brake cleaner).

Cleaning is simple: under the bonnet, unplug the connector, remove the two screws, lift the sensor body out, and give the sensing elements a gentle spray with MAF cleaner. Let it dry fully, refit with the flow arrow pointing the right way, and ensure the O-ring seals properly. Avoid touching the element with fingers or tools. After refitting, clear any stored codes and allow a short ECU relearn drive, some owners like to do a battery-off reset, but a calm drive cycle generally does the trick.

If the sensor is faulty, go for a quality OEM-equivalent unit. Cheap replicas can skew readings and cause more dramas than they solve. Also steer clear of oiled performance filters, the oil mist can contaminate the MAF and send the Pajero into limp mode. Keep the intake tight, the filter clean, and the MAF will happily clock up the kilometres.

Popular questions about the 2002 Pajero MAF sensor

Does a 2002 Pajero use a MAF or a MAP sensor?

It uses a MAF sensor, and many variants also have a MAP/boost sensor. The ECU blends signals, but fuelling is primarily referenced to the MAF on both the 3.5 petrol and 3.2 DI-D.

What are the common symptoms of a failing MAF on the 3.2 DI-D?

Sluggish take-off, black smoke under load, poor economy, surging, and a check engine light are typical. Limp mode can appear with P0100–P0104. Cleaning often helps if it’s just contamination, otherwise replacement is the fix.

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

If the issue is dirt or light oil film, a careful clean with MAF-specific cleaner usually restores it. If the sensor has dead spots, cracked housing, or returns implausible readings after cleaning, replacement with an OEM-quality unit is the smart move.