Oxygen sensor 6 — lambda / current
Last reviewed 2026-08-31
Mode 01 · PID 39 (decimal 57)
Description
Wide-range O2 sensor 6, same layout as PID 34.
- PID number
- 39 · 57
- Unit
- ratio / mA
- Range
- 0 … 2
- Data bytes
- 4
- Formula
- (2/65536)*((A*256)+B) ; ((C*256)+D)/256-128
- 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 39