DODGE

18-063-26

Manufacturer communications

Publication date: 2026-06-25
Received by NHTSA: 2026-07-02
NHTSA record numbers: 11034359

Manufacturer summary

Original wording in English

Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs):
• P0420 - Catalyst System Efficiency Below Threshold Bank 1.
• P0430 - Catalyst System Efficiency Below Threshold Bank 2. Customers may also comment on the following:
• Vehicle fails emissions inspection testing This bulletin involves reprogramming the PCM with the latest available software.

NHTSA manufacturer communications ↗

Reported code forms

P0420 P0430

Manufacturer wording

Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.

DodgeP0420

Catalyst System Efficiency Below Threshold Bank 1

NHTSA 10187697 · NHTSA 10187699 · NHTSA 10243229

DodgeP0430

Catalyst System Efficiency Below Threshold Bank 2

NHTSA 10187697 · NHTSA 10187699 · NHTSA 10243229

Check vehicle applicability

A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.

Make	Model	Model year
Dodge	JOURNEY	2019

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