Ambient air temperature

Last reviewed 2026-08-31

Description

Outside air. Standard PID 46 on many cars; manufacturer DID on others.

Unit

°C

Group

ice

Protocol requests

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

• Ambient air temperature

  Outside / ambient air temperature. Some cars only expose this as a manufacturer DID.

  OBD · mode 01 · PID 46 · default header · primary

  Source label: Standard J1979 mapping