Odometer

Last reviewed 2026-08-31

Mode 01 · PID A6 (decimal 166)

Description

Odometer reading. Mandated on many later type approvals (CARB from MY 2019; also appears on later EU cars).

PID number

A6 · 166

Unit

km

Range

0 … 429496729.5

Data bytes

4

Formula

(A*(2^24)+B*(2^16)+C*(2^8)+D)/10

• 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.