Exhaust particulate control system diagnostic time/count

Last reviewed 2026-08-31

Mode 01 · PID C4 (decimal 196)

Description

Particulate-control diagnostic time and event count, including engine idle/stop request flags.

PID number

C4 · 196

Unit

s / count

Range

0 … 4294967295

Data bytes

8

Formula

Time and count; B5 idle request, B6 stop request

• 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.