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P0100 — Mass Airflow Sensor Circuit Malfunction

SeriousEngine/AirPower derate likely — plan to stop soon

Seen on: Heavy Truck

Mass Airflow Sensor Circuit Malfunction. Common causes: MAF sensor circuit fault.

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How serious is it?

Serious. Power derate likely — plan to stop soon.

Most likely causes

  1. MAF sensor circuit fault
  2. Failed sensor
  3. dirty sensor element
  4. wiring fault

First moves (roadside)

  1. Inspect MAF sensor for contamination
  2. measure signal voltage
  3. replace if failed

FAQ

What does P0100 mean?

Mass Airflow Sensor Circuit Malfunction. Common causes: MAF sensor circuit fault.

How serious is P0100?

Serious — Power derate likely — plan to stop soon.

What's the most likely cause of P0100?

The most common cause is: MAF sensor circuit fault. Other possibilities include Failed sensor; dirty sensor element; wiring fault.

Can I keep driving with P0100?

Power derate likely — plan to stop soon. When in doubt, get a qualified mobile diesel tech on the truck before continuing.

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Find a mechanic or related guides

General diagnostic guidance for diesel engines (Cummins, Detroit, PACCAR, Volvo, Mack and more). Not a substitute for a scan-tool diagnosis on your specific truck.