Short term secondary O2 trim — Bank 2 / 4

Last reviewed 2026-08-31

Mode 01 · PID 57 (decimal 87)

Description

Short-term secondary oxygen-sensor trim banks 2 and 4. Same scale as PID 55.

PID number

57 · 87

Unit

%

Range

-100 … 99.2

Data bytes

2

Formula

(A*100/128)-100 ; (B*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.