P1720 on the 2015 Jeep 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.
This code is specific to a manufacturer and is not described here. Its meaning is in the manufacturer's service information.
| 2101423 | 2023-08-21. Service bulletin. Power Transfer Unit (PTU) Broken Input Spline XJ1 Warranty Extension 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: ? P1720-00 - Output Speed Sensor Wheel Speed Rationality. ? P215C-00 - Output Shaft Speed Wheel Speed Correlation. This bulletin involves replacing the PTU assembly with an updated part. |
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| 2101721 | 2023-01-17. Service bulletin. Power Transfer Unit (PTU) Broken Input Spline - X89 Warranty Extension This bulletin involves replacing the PTU assembly with an updated part. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that one or more of the following Diagnostic Trouble Codes (DTCs) have been set: P1720-00 - Output Speed Sensor-Wheel Speed Rationality. P215C-00 - Output Shaft Speed Wheel Speed Correlation. The customer may also describe one or more of the following: Grinding noise coming from under the vehicle while driving. Vehicle will not move. |
| 2101721-1 | 2023-01-17. Service bulletin. Power Transfer Unit (PTU) Broken Input Spline - X89 Warranty Extension This bulletin involves replacing the PTU assembly with an updated part. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that one or more of the following Diagnostic Trouble Codes (DTCs) have been set: P1720-00 - Output Speed Sensor-Wheel Speed Rationality. P215C-00 - Output Shaft Speed Wheel Speed Correlation. The customer may also describe one or more of the following:Grinding noise coming from under the vehicle while driving. Vehicle will not move. |
| 2101721 | 2022-10-17. Service bulletin. Power Transfer Unit (PTU) Broken Input Spline - X89 Warranty Extension This bulletin involves replacing the PTU assembly with an updated part. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that one or more of the following Diagnostic Trouble Codes (DTCs) have been set: P1720-00 - Output Speed Sensor-Wheel Speed Rationality. P215C-00 - Output Shaft Speed Wheel Speed Correlation. The customer may also describe one or more of the following: Grinding noise coming from under the vehicle while driving. Vehicle will not move. |
| 2101721RevA | 2022-10-17. Service bulletin. Power Transfer Unit (PTU) Broken Input Spline - X89 Warranty Extension This bulletin involves replacing the PTU assembly with an updated part. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that one or more of the following Diagnostic Trouble Codes (DTCs) have been set: P1720-00 - Output Speed Sensor-Wheel Speed Rationality. P215C-00 - Output Shaft Speed Wheel Speed Correlation. The customer may also describe one or more of the following:Grinding noise coming from under the vehicle while driving. Vehicle will not move. |
| 2101721 | 2022-10-17. Service bulletin. Power Transfer Unit (PTU) Broken Input Spline - X89 Warranty Extension This bulletin involves replacing the PTU assembly with an updated part. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that one or more of the following Diagnostic Trouble Codes (DTCs) have been set: P1720-00 - Output Speed Sensor-Wheel Speed Rationality. P215C-00 - Output Shaft Speed Wheel Speed Correlation. The customer may also describe one or more of the following: Grinding noise coming from under the vehicle while driving. Vehicle will not move. |
| 2101721REVA | 2022-10-17. Service bulletin. Power Transfer Unit (PTU) Broken Input Spline - X89 Warranty Extension This bulletin involves replacing the PTU assembly with an updated part. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that one or more of the following Diagnostic Trouble Codes (DTCs) have been set: P1720-00 - Output Speed Sensor-Wheel Speed Rationality. P215C-00 - Output Shaft Speed Wheel Speed Correlation. The customer may also describe one or more of the following:Grinding noise coming from under the vehicle while driving. Vehicle will not move. |
| 21-017-21 Rev. A | 2021-06-28. Service bulletin. Power Transfer Unit (PTU) Broken Input Spline - X89 Warranty Extension This bulletin involves replacing the PTU assembly with an updated part. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that one or more of the following Diagnostic Trouble Codes (DTCs) have been set: P1720-00 - Output Speed Sensor-Wheel Speed Rationality. P215C-00 - Output Shaft Speed Wheel Speed Correlation. The customer may also describe one or more of the following: Grinding noise coming from under the vehicle while driving. Vehicle will not move. |
| 21-017-21 | 2021-06-28. Service bulletin. Power Transfer Unit (PTU) Broken Input Spline - X89 Warranty Extension This bulletin involves replacing the PTU assembly with an updated part. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that one or more of the following Diagnostic Trouble Codes (DTCs) have been set: P1720-00 - Output Speed Sensor-Wheel Speed Rationality. P215C-00 - Output Shaft Speed Wheel Speed Correlation. The customer may also describe one or more of the following:Grinding noise coming from under the vehicle while driving. Vehicle will not move. |
9 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.