P1DAD on the 2016 Fiat 500
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.
| 21-024-15 REVA | 2018-11-26. Service bulletin. Flash: Transmission Shift And Drivability Enhancements This bulletin involves reprogramming the Transmission Control Module (TCM) with the latest available software. A small number of 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): ? P0711 - Transmission Fluid Temperature Sensor A Circuit Range-Performance ? P1CC9 - Unable to Engage Gear ? P1D98 - Incorrect Gear Ratio Clutch B or D Defective ? P1DAD - Input Shaft-Output Shaft Direction Correlation ? U1424 - Implausible Engine Torque Signal Received In addition, the customer may also experience one or more of the following transmission related conditions: ? Less than desired 1-2 upshift on tip-in acceleration. ? Less than desired accelerator pedal response in Sport and TractionPlus modes. ? RPM flare at engine start. ? Less than desired idle performance when shifting into DRIVE or REVERSE following a cold start. |
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| 21-024-15 REV-B | 2018-11-19. Service bulletin. Flash: Transmission Shift And Drivability Enhancements This bulletin involves reprogramming the Transmission Control Module (TCM) with the latest available software. A small number of 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): ? P0711 - Transmission Fluid Temperature Sensor A Circuit Range-Performance. ? P1CC9 - Unable to Engage Gear. ? P1D98 - Incorrect Gear Ratio Clutch B or D Defective. ? P1DAD - Input Shaft-Output Shaft Direction Correlation. ? U1424 - Implausible Engine Torque Signal Received. In addition, the customer may also experience one or more of the following transmission related conditions: ? Garage Shifts (Shifting from Park or Neutral into Drive or Reverse.) ? Harsh 1-2 upshifts. ? Less than desired accelerator pedal response in Sport and TractionPlus modes. ? RPM flare at engine start. ? Less than desired idle performance when shifting into DRIVE or REVERSE following a cold start. |
2 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.