RAM 1500 2019 — technical service bulletin
Bulletin 18-033-25 · NHTSA communication 11020111 · issued Jun 25, 2025
Technical service bulletin
communication type
Electrical System
component
2019
model years
1
vehicle entries
Official summary
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. ● P06EF - Engine Restart Performance. ● P0175 - Fuel System 2/1 Rich. ● P258B - Electronic Vacuum Pump Performance. ● P0128 - Thermostat Rationality. ● C0062 - Longitudinal Acceleration Sensor. In addition, the customer may
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.