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Ram TSB #1805023
2023 Ram 1500
TSB Document:
Affected Component: ELECTRICAL SYSTEM
- 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.
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