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August 7, 2025 Service bulletin

Valve Body Replacement Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the...

Jeep technical service bulletin 21-016-25 REV. B for 2023-2025 Jeep Grand Cherokee, 2025 Ram 1500 and 2023-2025 Jeep Wagoneer and others.

Bulletin number
21-016-25 REV. B
Component
Power train
Summary
Valve Body Replacement Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● U0101 - Lost Communication With The Transmission Control Module (TCM). ● U0402 - Implausible Data Received From TCM. ● U0418 - Implausible Data Received From Brake System Control Module 1. Customers may also comment on the following: ● Vehicle will go in limp-in mode. After the vehicle enters limp-in mode and has been shifted into Park, the vehicle will not shift into a forward or reverse gear. This bulletin involves replacing the transmission valve body assembly.

Owners of these vehicles have filed 192 complaints in the transmission category.

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