Flash: Powertrain Control Module (PCM) Updates Customers may experience a Malfunction Indicator Lamp (MIL)...
Ram technical service bulletin 1800123 for 2022 Ram 1500.
- Bulletin number
- 1800123
- Component
- Power train
- Summary
- Flash: Powertrain Control Module (PCM) Updates Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following Diagnostic Trouble Code (DTC) has been set: ? U0402-00 - IMPLAUSIBLE DATA RECEIVED FROM TCM. When U0402-00 sets in the PCM, the module will start to deny torque requests from Transmission Control Module (TCM), the transmission will fault and go to a fixed gear limp-in reaction, and send the MIL request to PCM. The customer may also experience the following: ? A limp mode when DTC sets in the PCM. This bulletin involves reprogramming the PCM with the latest available software.
Owners of these vehicles have filed 109 complaints in the transmission category.
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