{"nhtsa_id":11029679,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-03-05","date":"2026-02-18","document_id":"18-024-26","mfr_campaign":null,"replaces":null,"component":"UNKNOWN OR OTHER","mfr_system":null,"summary":"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.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11029679-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11029679-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11029679","components":[],"codes":["P0128","P208B","P24A4"],"topics":[],"vehicles":[{"make":"RAM","model":"3500","year_from":2023,"year_to":2023,"match":"exact","vehicle_ids":["2023_ram_3500"]}],"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":[]}