NOx sensor corrected concentration — sensors 3 and 4
Last reviewed 2026-08-31
Mode 01 · PID A8 (decimal 168)
Description
Corrected NOx concentration from sensors 3 and 4.
- PID number
- A8 · 168
- Unit
- ppm
- Range
- —
- Data bytes
- 4
- Formula
- Corrected NOx sensors 3 and 4
- 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 A8