U0100 on the 2019 Jeep Renegade
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.
| 1800623 | 2023-07-31. Service bulletin. Flash: Powertrain Control Module (PCM) Updates Customers may experience the following: ? Engine Stop/Start does not work as expected and it is often automatically deactivated. Customers may also experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes (DTCs): ? P2110 - Electronic Throttle Control System Bank 1 - Forced Limited RPM. ? P2173 - High Airflow/Vacuum Leak Detected (Slow Accumulation). ? U0100 - Lost Communication With ECM/PCM. ? P0456 - EVAP System Small Leak. NOTE: If DTC P0456 is present use the wiTECH Small Leak Verification Test (SLVT) to determine if a leak is present in the system. ? P1CEA - Boost Side EVAP Purge System Performance. In addition, the customer may also experience the following: ? The vehicle will not crank if the ECM gets hotter than 50 °C (122 °F). ? Intermittent no-crank when first starting the vehicle. The following DTC has been changed from a one trip fault to a two trip fault: ? P0607 - ECU Internal Performance. This bulletin involves reprogramming the PCM with the latest available software. |
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| 18-006-23 | 2023-02-13. Service bulletin. Flash: Powertrain Control Module (PCM) Updates **Customers may experience the following: Stop/start function deactivated.**Customers may also experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following Diagnostic Trouble Code (DTC): P2110 - Electronic Throttle Control System Bank 1 - Forced Limited RPM. P2173 - High Airflow/Vacuum Leak Detected (Slow Accumulation). U0100 - Lost Communication With ECM/PCM. P0456 - EVAP System Small Leak. NOTE: If DTC P0456 is present use the wiTECH Small Leak Verification Test (SLVT) to determine if a leak is present in the system. P1CEA - Boost Side EVAP Purge System Performance. In addition, the customer may also experience the following: The vehicle will not crank if the ECM gets hotter than 50 °C (122 °F). Intermittent no-crank when first starting the vehicle. The following DTC has been changed from a one trip fault to a two trip fault: P0607 - ECU Internal Performance. This bulletin involves reprogramming the PCM with the latest available software. |
| 1803821 | 2022-09-26. Service bulletin. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more ofthe following DTCs have been set: P2110 - Electronic Throttle Control System Bank 1 - Forced Limited RPM. P2173 - High Airflow/Vacuum Leak Detected (Slow Accumulation). U0100 - Lost Communication With ECM/PCM. P0456 - EVAP System Small Leak.If DTC P0456 is present use the wiTECH Small Leak Verification Test (SLVT) to determine if a leak is present in the system. P1CEA - Boost Side EVAP Purge System Performance. In addition, the customer may also experience the following: The vehicle will not crank if the ECM gets hotter than 50 °C (122°F). Intermittent no-crank when first starting the vehicle. The following Diagnostic Trouble Codes (DTCs) have been changed from a one trip fault to a two trip fault: P0607 - ECU Internal Performance. |
| 18-038-21 | 2021-05-24. Service bulletin. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more ofthe following DTCs have been set: P2110 - Electronic Throttle Control System Bank 1 - Forced Limited RPM. P2173 - High Airflow/Vacuum Leak Detected (Slow Accumulation). U0100 - Lost Communication With ECM/PCM. P0456 - EVAP System Small Leak.If DTC P0456 is present use the wiTECH Small Leak Verification Test (SLVT) to determine if a leak is present in the system. P1CEA - Boost Side EVAP Purge System Performance. In addition, the customer may also experience the following: The vehicle will not crank if the ECM gets hotter than 50 °C (122°F). Intermittent no-crank when first starting the vehicle. The following Diagnostic Trouble Codes (DTCs) have been changed from a one trip fault to a two trip fault: P0607 - ECU Internal Performance. |
| 18-028-20 REV. A | 2020-06-22. Service bulletin. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following DTCs have been set:U0100 - Lost Communication With ECM/PCM. P0456 - EVAP System Small Leak. If DTC P0456 is present use the wiTECH Small Leak Verification Test (SLVT) to determine if a leak is present in the system. P1CEA - Boost Side EVAP Purge System Performance. In addition, the customer may also experience the following: The vehicle will not crank if the ECM gets hotter than 50 °C (122 °F). Intermittent no-crank when first starting the vehicle. |
| 18-028-20 | 2020-05-26. Service bulletin. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more ofthe following DTCs have been set:U0100 - Lost Communication With ECM/PCM. P0456 - EVAP System Small Leak. P1CEA - Boost Side EVAP Purge System Performance. In addition, the customer may also experience the following:The vehicle will not crank if the ECM gets hotter than 50 °C (122°F). Intermittent no-crank when first starting the vehicle. |
| 18-028-20 | 2020-05-18. Service bulletin. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more ofthe following DTCs have been set:U0100 - Lost Communication With ECM/PCM. P0456 - EVAP System Small Leak. P1CEA - Boost Side EVAP Purge System Performance. In addition, the customer may also experience the following:The vehicle will not crank if the ECM gets hotter than 50 °C (122°F). Intermittent no-crank when first starting the vehicle. |
| 18-028-20 | 2020-04-27. Service bulletin. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more ofthe following DTCs have been set:U0100 - Lost Communication With ECM/PCM. P0456 - EVAP System Small Leak. P1CEA - Boost Side EVAP Purge System Performance. In addition, the customer may also experience the following:The vehicle will not crank if the ECM gets hotter than 50 °C (122°F). Intermittent no-crank when first starting the vehicle. |
8 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.