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Jeep TSB #21-011-16 REV. A
2016 Jeep Grand Cherokee
TSB Document:
Affected Component: ELECTRICAL SYSTEM
- Summary
- Flash: Transmission Diagnostic And Shift Enhancements This bulletin involves reprogramming the Transmission Control Module (TCM) with the latest available software. Some customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation, a technician may find the following Diagnostic Trouble Code (DTC) stored in the TCM memory: · U0404 - Invalid Data Received From Gear Shift Control Module "A". In addition, some customers may experience the following conditions: · **Bumps on 2 -1 down-shift while braking.** · The M on the shifter and Instrument cluster may be blinking. The following improvements are included in this update: · **Improved 1 - 2 light throttle up-shifts.**
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