P0100

Mass Air Flow (MAF) Sensor Circuit

Q: What does fault code P0100 mean?

Mass Air Flow (MAF) Sensor Circuit. The MAF sensor signal voltage is outside the range expected by the ECM, which cannot determine the actual amount of air entering the engine.

Q: What are the possible causes of P0100?

MAF sensor dirty or damaged; MAF sensor power or ground poor; Sensor signal wire open or shorted; Severe air intake system leak; ECM fault.

Severity: Medium Fuel & Air Metering Generic Code

Detailed Description

The MAF sensor signal voltage is outside the range expected by the ECM, which cannot determine the actual amount of air entering the engine.

Possible Causes

MAF sensor dirty or damaged

MAF sensor power or ground poor

Sensor signal wire open or shorted

Severe air intake system leak

ECM fault.

Solutions & Repair Guide

First clean the MAF sensor using a dedicated cleaner; Check the sensor connector and wiring harness; Inspect intake piping for cracks or disconnections; Measure MAF sensor signal output voltage (typically 0.5-1.2V at idle); Replace the MAF sensor if necessary.

Disclaimer: The information above is for reference only and does not constitute professional repair advice. Actual causes may vary depending on vehicle make, model, year, and configuration. Always consult a qualified technician for accurate diagnosis.