Mass air flow sensor

Last reviewed 2026-08-31

Mode 01 · PID 66 (decimal 102)

Description

Later MAF: byte A support bits, then two 16-bit sensor values scaled by 1/32 g/s.

PID number

66 · 102

Unit

g/s

Range

0 … 2047.96875

Data bytes

5

Formula

Sensor A: ((B*256)+C)/32 ; Sensor B: ((D*256)+E)/32

• Also valid as Mode 02 freeze-frame data (same PID number, snapshot at last DTC).

Defined by SAE J1979 / ISO 15031-5. Public index — not a substitute for the paid SAE document.