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Mode 01 • PID 81

OBD2 PID 0181

Engine run time for AECD

Definition

Mode
01 (hex)
PID
81 (hex)
Data bytes
21
Units
—

How to read PID 0181

Send mode 01 with PID 81 over OBD-II. The ECU returns 21 data byte(s). The result is “Engine run time for AECD”. This is standard SAE J1979 data supported by most OBD-II scan tools and loggers.

Why it matters for tuning

Live PIDs like this are how tuners and workshops verify a remap on the road — logging RPM, load, boost, lambda and temperatures to confirm the map is safe. The desktop Softechpro Solutions software complements live logging with offline ECU editing: DPF/EGR/AdBlue/DTC off and Stage tuning with automatic checksum.

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