Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the...
Jeep technical service bulletin 21-048-19 for 2018 Jeep Grand Cherokee.
- Bulletin number
- 21-048-19
- Component
- Power train
- Summary
- Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes (DTCs) have been set: P0979-00 - Shift Solenoid 3 Control Circuit Low. P0219-00 - Engine Overspeed Condition. In addition, the customer may notice the following condition:A harsh shift on coast down 3-2 or 2-1.
Owners of these vehicles have filed 75 complaints in the transmission category.
Vehicles covered
- Jeep Grand Cherokee 2018 2018
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