{"nhtsa_id":11020111,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2025-07-02","date":"2025-06-25","document_id":"18-033-25","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM","mfr_system":null,"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 experience one or more of the following: ● **Vehicle fails emissions inspection testing due to OBD catalyst monitor readiness.** ● Engine RPM erratic and or bucking, when accelerating after slowing down. ● Occasional engine shut off while shifting from 4WD low to 2WD. ● Improvements to the vacuum pump cycle time. ● Rough idle after cold start. This bulletin involves reprogramming the PCM with the latest available software.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11020111-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11020111-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11020111","components":[{"id":"electrical","name":"Electrical system","parent":null}],"codes":["C0062","P0128","P0175","P0420","P0430","P0456","P06EF","P258B"],"topics":[],"vehicles":[{"make":"RAM","model":"1500","year_from":2019,"year_to":2019,"match":"exact","vehicle_ids":["2019_ram_1500"]}],"as_of":"2026-10-19","note":"A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.","attribution":[]}