Diagnostic Procedure with Cancel Code: 50

WARNING: This page is about a different car, the 2022 Subaru WRX. However, it is still accessible from the selected car via links, so may be relevant.

Clogging of the filter for exhaust gas purification was detected. Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE

NOTE:

This cancel code may also be detected, when the engine power is limited resulting from protection of the exhaust gas purification filter due to the fuel level warning light illumination. In this case, first check that the fuel level warning light is off after refueling, and then perform the cruise control setting operation again. If the cancel code is not detected, it is normal.