Oxygen sensor 2 — voltage / STFT
Last reviewed 2026-08-31
Mode 01 · PID 15 (decimal 21)
Description
Oxygen sensor 2, same layout as PID 14.
- PID number
- 15 · 21
- Unit
- V / %
- Range
- 0 … 1.275
- Data bytes
- 2
- Formula
- A/200 ; (B*100/128)-100 if B!=0xFF
- 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 15