CHRYSLER
18-089-24
Manufacturer communications
- Publication date
- 2024-12-19
- Received by NHTSA
- 2025-01-03
- NHTSA record numbers
- 11012184
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. NOTE: If DTC P0456 is present use the wiTECH Small Leak Verification test (SLVT) to determine if a leak is present in the system. This bulletin involves reprogramming the PCM with the latest available software."
• **P0420 - Catalyst System Efficiency Below Threshold Bank 1.
• P0430 - Catalyst System Efficiency Below Threshold Bank 2.**
• P0456 - EVAP System Small Leak. NOTE: If DTC P0456 is present use the wiTECH Small Leak Verification test (SLVT) to determine if a leak is present in the system. This bulletin involves reprogramming the PCM with the latest available software."
Reported code forms
Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
Chrysler
P0420Catalyst System Efficiency Below Threshold Bank 1Chrysler
P0430Catalyst System Efficiency Below Threshold Bank 2Chrysler
P0456EVAP System Small LeakCheck 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 |
|---|---|---|
| Chrysler | 300 | 2019 |