Affected Component: EQUIPMENT

Date Published
OCT 09, 2023
NHTSA TSB #
10244906
TSB Document
Summary
This Service Information Bulletin announces diagnostic service procedures to be followed when DTC P0420 (Catalyst System Efficiency Below Threshold Bank 1) is detected by the Engine Control Module (ECM). If DTC P0420 is found to be stored in the ECM, follow the diagnostic procedures outlined below.