RAM
18-024-26
Manufacturer communications
- Publication date
- 2026-02-18
- Received by NHTSA
- 2026-03-05
- NHTSA record numbers
- 11029679
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 SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs):
• P0128-00 - Thermostat Rationality.
• P24A4-00 - Particulate Filter Restriction - Soot Accumulation Too High.
• P208B-00 - Reductant Pump 1 Control Performance.** Customers may experience one or more of the following:
• Lower than expected fuel economy when vehicle is lightly loaded, operating in stop and go traffic and at lower speeds.
• Long cranking / extended starting times. **Other software enhancement included with this update:
• "Air Handling Performance Test" is now available to help troubleshoot air handling DTCs.** This bulletin involves reprogramming the PCM with the latest available software.
• P0128-00 - Thermostat Rationality.
• P24A4-00 - Particulate Filter Restriction - Soot Accumulation Too High.
• P208B-00 - Reductant Pump 1 Control Performance.** Customers may experience one or more of the following:
• Lower than expected fuel economy when vehicle is lightly loaded, operating in stop and go traffic and at lower speeds.
• Long cranking / extended starting times. **Other software enhancement included with this update:
• "Air Handling Performance Test" is now available to help troubleshoot air handling DTCs.** 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.
Ram
P208B-00Reductant Pump 1 Control Performance.** Customers may experience one or more of the followingCheck 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 |
|---|---|---|
| Ram | 3500 | 2023 |