Mode $03 (Emission-Related Powertrain DTC)
WARNING: This page is about a different car, the 2021 Subaru Impreza. However, it is still accessible from the selected car via links, so may be relevant.
Refer to "Diagnostic Trouble Code (DTC)" for information about data denoting emission-related powertrain DTC. Ref. to TRANSMISSION (DIAGNOSTICS) (IMPREZA MODEL)>DIAGNOSTIC TROUBLE CODE (DTC)>LIST .