Home21-016-25 REV. B · JEEP, RAM
JEEP, RAM

21-016-25 REV. B

Manufacturer communications

Publication date
2025-08-07
Received by NHTSA
2025-08-13
NHTSA record numbers
11021838

Manufacturer summary

Original wording in English

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.

NHTSA manufacturer communications ↗

Reported code forms

U0101U0402U0418

Manufacturer wording

Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.

Check vehicle applicability

A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.

MakeModelModel year
JeepGRAND CHEROKEE2025
JeepGRAND CHEROKEE2024
JeepGRAND CHEROKEE2023
JeepGRAND CHEROKEE L2025
JeepGRAND CHEROKEE L2024
JeepGRAND CHEROKEE L2023
JeepGRAND WAGONEER2025
JeepGRAND WAGONEER2024
JeepGRAND WAGONEER2023
JeepWAGONEER2025
JeepWAGONEER2024
JeepWAGONEER2023
Ram15002025

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