Mitsubishi Fault Code

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P0102

Low power; Engine "suffocating" under load; Black smoke; Poor gear shifts (Auto).

System

Not specified

Symptom

Low power; Engine "suffocating" under load; Black smoke; Poor gear shifts (Auto).

Diagnosis & fix steps

Mass Air Flow (MAF) Circuit Low. LOGIC: Signal voltage is below 0.5V. This usually means the sensor is unplugged or the sensing element is extremely dirty/broken. ACTION: 1. Inspect the MAF sensor connector for loose pins. 2. Clean the sensor using dedicated MAF cleaner only. 3. Check for 12V and 5V power at the plug. FIX: Clean or replace the MAF Sensor; repair broken ground wire in the harness.

Red Seal field insights

These sensors are sensitive to "over-oiled" aftermarket air filters. The oil coats the hot wire, causing it to read incorrectly. Always check the air box seal; dust bypassing the filter will also kill this sensor.

Same code keeps coming back?

That's a program problem, not a part problem. Book a 30-minute uptime review with Grant, a Red Seal Heavy Duty Technician.

Book an uptime review

Read before you touch anything

  • This is general reference information, not a repair manual. It is for trained, qualified technicians.
  • Fault codes, meanings and procedures vary by model, serial number and software version. Confirm the code and the procedure against the manufacturer's service manual before acting.
  • Follow the OEM service manual, torque specs and your site's safety procedures: lockout/tagout, block raised equipment, relieve hydraulic, fuel and air pressure, and let hot systems cool.
  • You use this information at your own risk. Adventure Mechanical and AM Fleet Integrity accept no liability for damage, injury, downtime or loss arising from its use.
  • Not affiliated with or endorsed by any manufacturer. Brand names are used only to identify the equipment a code applies to.

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