Engine RPM

Last reviewed 2026-08-31

Description

Crankshaft speed. Almost always a standard Mode 01 PID.

Unit

rpm

Group

operating

Protocol requests

The same meaning can arrive through different mode + PID + ECU header combinations. Do not merge by hex number alone.

• Engine speed

  Crankshaft speed. The most widely implemented Mode 01 PID. On a hybrid this is the ICE, not MG1/MG2.

  OBD · mode 01 · PID 0C · default header · primary

  Source label: Standard J1979 mapping