Home18-064-26 · CHRYSLER, DODGE
CHRYSLER, DODGE

18-064-26

Manufacturer communications

Publication date
2026-06-26
Received by NHTSA
2026-07-02
NHTSA record numbers
11034362

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.**
• P0456 - EVAP System Small Leak. **Customers may also comment on one or more of the following:
• Vehicle fails emissions inspection testing.* This bulletin involves reprogramming the PCM with the latest available software.

NHTSA manufacturer communications ↗

Reported code forms

P0420P0430P0456

Manufacturer wording

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

Check vehicle applicability

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

MakeModelModel year
ChryslerTOWN AND COUNTRY2019
DodgeCARAVAN2019

Data coverage →