Flash: Transmission Control Module (TCM) Update Customers may experience a Malfunction Indicator Lamp...
Ram technical service bulletin 21-027-25 for 2025 Ram 2500.
- Bulletin number
- 21-027-25
- Component
- Power train
- Summary
- " Flash: Transmission Control Module (TCM) Update Customers may experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle may exhibit/set the following Diagnostic Trouble Code (DTC): ● P1DCD-00 - TCM Monitoring Processor Performance Multiple Clutches Locked Up. Customers may also experience the following: ● Vehicle enters into limp home mode. This bulletin involves inspecting the TCM software level and possibly reprogramming the TCM with the latest available software."
Owners of these vehicles have filed 8 complaints in the transmission category.
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