Oxygen sensors present (4 banks)
Last reviewed 2026-08-31
Mode 01 · PID 1D (decimal 29)
Description
Alternate O2-present bitmap for four-bank layouts (PID 13 is the two-bank form).
- PID number
- 1D · 29
- Unit
- —
- Range
- —
- Data bytes
- 1
- Formula
- Bit encoded [B1S1..B4S2]
- Also valid as Mode 02 freeze-frame data (same PID number, snapshot at last DTC).
- Bit-encoded or enumerated — not a single scaled physical value.
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 1D