Control module voltage

Last reviewed 2026-08-31

Description

OBD module / 12 V related voltage (PID 42). Not HV pack voltage.

Unit

V

Group

electrical

Protocol requests

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

• Control module voltage

  Control-module / OBD supply voltage. On a hybrid this is not HV pack voltage.

  OBD · mode 01 · PID 42 · default header · primary

  Source label: Standard J1979 mapping