Short term fuel trim — Bank 1

Last reviewed 2026-08-31

Mode 01 · PID 06 (decimal 6)

Description

Short-term fuel trim bank 1. Positive = ECU adding fuel (mixture was lean). Negative = removing fuel (mixture was rich).

PID number

06 · 6

Unit

%

Range

-100 … 99.2

Data bytes

1

Formula

(A*100/128)-100

• 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.