P1DD2 on the 2019 Fiat 500X
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.
This code is specific to a manufacturer and is not described here. Its meaning is in the manufacturer's service information.
| 21-027-20 | 2020-05-26. Service bulletin. Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. Some customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation, a technician may find oneor more of the following Diagnostic Trouble Codes (DTCs) have been set:P0780 - Gear Shift Malfunction. P1DD2-00 - Torque Request Signal From TCM Denied. Customers or technicians may experience the following:Transmission will be placed into Limp-in mode. While driving at 65 kph (40 mph) a bump will be felt and the RPM will jumpto 4000 RPM. |
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| 21-027-20 | 2020-05-18. Service bulletin. Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. Some customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation, a technician may find oneor more of the following Diagnostic Trouble Codes (DTCs) have been set:P0780 - Gear Shift Malfunction. P1DD2-00 - Torque Request Signal From TCM Denied. Customers or technicians may experience the following:Transmission will be placed into Limp-in mode. While driving at 65 kph (40 mph) a bump will be felt and the RPM will jumpto 4000 RPM. |
| 21-027-20 | 2020-04-27. Service bulletin. Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. Some customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation, a technician may find one or more of the following Diagnostic Trouble Codes (DTCs) have been set: P0780 - Gear Shift Malfunction. P1DD2-00 - Torque Request Signal From TCM Denied. Customers or technicians may experience the following: Transmission will be placed into Limp-in mode. While driving at 65 kph (40 mph) a bump will be felt and the RPM will jump to 4000 RPM. |
3 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.