P0420

Catalyst System Efficiency Below Threshold

NHTSA 10128539 ↗ NHTSA 10128556 ↗ NHTSA 10128868 ↗

Catalyst System Efficiency Below Threshold Bank 1

NHTSA 10187697 ↗ NHTSA 10187699 ↗ NHTSA 10243229 ↗

Catalyst System Efficiency Below Threshold Bank 1

NHTSA 10243231 ↗ NHTSA 11015523 ↗ NHTSA 11020109 ↗

FORD

Some of the vehicles listed in the Model statement above may exhibit an incorrectly illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P0420 stored in the powertrain control module (PCM). This may be due to the software in the PCM.

RAM

Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle exhibit/set SYMPTOM: one or more of the following Diagnostic Trouble Codes (DTCs): ● P0420 - Catalyst System Efficiency Below Threshold Bank 1. ● P0430 - Catalyst System Efficiency Below Thresh…

CHRYSLER, DODGE

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 Threshol…

DODGE

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 …