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Home >> Ford >> 2021 >> Mustang Mach 1 Premium, Automatic Trans >> Repair and Diagnosis >> Engine Mechanical >> Exhaust System - 5.0L 32V Ti-VCT (359KW/486PS) (WU)/5.0L Ti-VCT V8 (343KW/466PS) (MF) >> Diagnosis And Testing >> Catalyst System >> Diagnostic Trouble Code (DTC) Chart

Diagnostic Trouble Code (DTC) Chart

Diagnostics in this article assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to: Diagnostic Methods .

Diagnostic Trouble Code Chart 

Module DTC Description Action
PCM P0420:00 Catalyst System Efficiency Below Threshold (Bank 1): No Sub Type Information GO to Pinpoint Test HF 
PCM P0430:00 Catalyst System Efficiency Below Threshold (Bank 2): No Sub Type Information GO to Pinpoint Test HF