Disconnected or damaged MAF connector; Open or shorted signal wire; Missing sensor power supply or ground; Failed MAF sensor; Large intake air leak after the sensor.

Mass air flow (MAF)

P0102 Mass or Volume Air Flow (MAF) Circuit Low Input

Q: What does P0102 mean?

Mass or Volume Air Flow (MAF) Circuit Low Input. The ECU monitors the output signal of the MAF sensor. P0102 is set when the signal stays below the minimum expected value with the engine running.

The ECU monitors the output signal of the MAF sensor. P0102 is set when the signal stays below the minimum expected value with the engine running.

Common causes

Disconnected or damaged MAF connector
Open or shorted signal wire
Missing sensor power supply or ground
Failed MAF sensor
Large intake air leak after the sensor

Typical symptoms

Check engine light (MIL) on
Hard starting, stalling or rough running
Reduced power or limp mode

P0102 and NuoVolta

If the MAF sensor has been removed for off-road or motorsport use, where permitted by law, the NuoVolta MAF Removal solution adjusts the ECU calibration to run without the MAF signal and the DTC removal feature can disable this code. Otherwise, check the connector, wiring and sensor first.

MAF Removal Available for 234 ECUs

Related codes

P0101Mass or Volume Air Flow (MAF) Circuit Range/Performance P0103Mass or Volume Air Flow (MAF) Circuit High Input

Diagnose and repair real faults first. Removing or disabling emission systems is only permitted where allowed by law, for example for off-road or motorsport use.