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Home >> Ford >> 2022 >> Mustang Mach 1 Premium, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (Exhaust System - 2.3L ECOBOOST (231KW/314PS)/2.3L ECOBOOST (257KW/350PS) - Mi4) >> Diagnosis And Testing >> Catalyst System >> Diagnostic Trouble Code (DTC) Chart

Diagnostic Trouble Code (DTC) Chart

WARNING: This page is about a different variant/trim than selected.

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

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