U0404 on the 2016 Jeep Grand Cherokee
The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.
Nobody has written a description of this code yet.
| 21-011-16 | 2022-09-26. Service bulletin. 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, 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 2 - 1, 3 - 2 and 6 - 5 down-shifts (6.4L only).** · Improved 1 - 2 light throttle up-shifts. |
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| 21-011-16 | 2018-06-11. Service bulletin. Flash: Transmission Enhancements This bulletin involves reprogramming of 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 condition: The M on the shifter and Instrument cluster may be blinking. |
| 21-011-16 REV. B | 2018-05-14. Service bulletin. 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, 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 2 - 1, 3 - 2 and 6 - 5 down-shifts (6.4L only).** · Improved 1 - 2 light throttle up-shifts. |
| 21-011-16 REV. A | 2017-11-03. Service bulletin. 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.** |
4 on file from NHTSA, as of 2026-10-19. See them in the bulletin list. A bulletin lists model years: read the document for which vehicles it concerns.