Long term fuel trim — Bank 1
Last reviewed 2026-08-31
Mode 01 · PID 07 (decimal 7)
Description
Learned long-term fuel trim bank 1. Same rich/lean scale as short-term trim (PID 06).
- PID number
- 07 · 7
- 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.
Sources
Provenance for this page. Official standards outrank community notes. See the confidence policy.
Official standard · high trust
SAE J1979 / ISO 15031-5 Mode 01 PID formulas (public index)
J1979 public PID index: 01 07