May 20, 2015 Service bulletin

Flash: Transmission Shift And Drivability Enhancements This bulletin involves reprogramming the...

Jeep technical service bulletin 21-033-15 for 2014 Jeep Grand Cherokee.

Bulletin number: 21-033-15
Component: Power train
Summary: Flash: Transmission Shift And Drivability Enhancements This bulletin involves reprogramming the Transmission Control Module (TCM) with the latest available software followed by a drive validation. The following software enhancement, for the 948TE 9-speed transmission, is being released to improve diagnostics for the following Diagnostic Trouble Codes (DTCs): ? P0711 - Transmission Fluid Temperature Sensor A Circuit Range-Performance ? P0887 - TCM Power Control Circuit High ? P1720 - Output Speed Sensor-Wheel Speed Rationality ? P1D98 - Incorrect Gear Ratio Clutch B or D Defective ? P215C - Output Shaft Speed Wheel Speed Correlation ? U0401 - Implausible Data Received From ECM-PCM The software also enables DTC P07A7 - Transmission Friction Element C Stuck On to set in the case of a dislodged C-clutch snap-ring.

Owners of these vehicles have filed 476 complaints in the transmission category.

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