Mass air flow

Last reviewed 2026-08-31

Description

Mass of air entering the engine per second. Helps the ECU calculate fuel delivery and load.

Unit

g/s

Group

ice

Protocol requests

The same meaning can arrive through different mode + PID + ECU header combinations. Do not merge by hex number alone.

• Mass air flow sensor (MAF) air flow rate

  Mass air flow into the engine. Later wide-range / dual MAF use PID 66.

  OBD · mode 01 · PID 10 · default header · primary

  Source label: Standard J1979 mapping