# U0402 on the 2014 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.

Nobody has written a description of this code yet.

## Bulletins for this model year that name U0402

- [10229189](https://open.wenmarpro.com/bulletins/10229189), 2023-01-09: Transmission Shift Quality C\-Clutch Snap Ring This bulletin involves removing the transmission, disassembling, and replacing the C\-Clutch snap ring. A small number of customers may experience less than desired shift quality during a 5\-4 downshift and/or Malfunction Indicator Lamp \(MIL\) Illumination. Upon further inspection, the technician may find Diagnostic Trouble Code \(DTC\) U0402 setting in the Powertrain Control Module \(PCM\) memory.
- [10229183](https://open.wenmarpro.com/bulletins/10229183), 2023-01-09: Transmission Shift Quality C\-Clutch Snap Ring This bulletin involves removing the transmission, disassembling, and replacing the C\-Clutch snap ring. A small number of customers may experience less than desired shift quality during a 5\-4 downshift and/or Malfunction Indicator Lamp \(MIL\) Illumination. Upon further inspection, the technician may find Diagnostic Trouble Code \(DTC\) U0402 setting in the Powertrain Control Module \(PCM\) memory.
- [10228106](https://open.wenmarpro.com/bulletins/10228106), 2022-12-19: Flash: 2.4L Powertrain Diagnostic And System Improvements This bulletin involves reprogramming the Powertrain Control Module \(PCM\) with the latest available software. Some customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find one or more of the following DTCs: 2015 KL Only · \*\*P0335 \- Crankshaft Position Sensor Circuit.\*\* · P0456 \- EVAP System Small Leak. · P0300 \- Multiple Cylinder Misfire. · P0301 \- Cylinder 1 Misfire. · P0302 \- Cylinder 2 Misfire. · P0303 \- Cylinder 3 Misfire. · P0304 \- Cylinder 4 Misfire. · P2610 \- PCM Internal Engine Off Timer Performance. · P1607 \- PCM Internal Shutdown Timer Rationality. · U0402 \- Implausible Data Received From TCM \(ED6\). · P0116 \- Engine Coolant Temperature Sensor 1 Performance. · P050D \- Cold Start Rough Idle. · P2172 \- High Airflow/Vacuum Leak Detected. · P219A \- Air\-Fuel Ratio Cylinder Imbalance Bank 1 has been set in the PCM. 2014 KL Only · P2172 \- High Airflow/Vacuum Leak Detected. · P219A \- Air\-Fuel Ratio Cylinder Imbalance Bank 1 has been set in the PCM. · P106A \- Cylinder 3 Oil Supply Solenoid Valve Switch Off Time Out Of Range. · P2251 \- O2 Sensor 1/1 Negative Current Control Circuit Open. · P0031 \- O2 Sensor 1/1 Heater Circuit Low. In addition, some customers may experience one or more of the following conditions: · Cold Engine Startup Flare and Idle Surge \(ED6\). · Intermittent elevated engine RPM at start up. · Less than desired gear engagement in lower ambient temperatures. · Less than desired idle performance.
- [10223610](https://open.wenmarpro.com/bulletins/10223610), 2022-10-17: Transmission Shift Quality C\-Clutch Snap Ring This bulletin involves removing the transmission, disassembling, and replacing the C\-Clutch snap ring. A small number of customers may experience less than desired shift quality during a 5\-4 downshift and/or Malfunction Indicator Lamp \(MIL\) Illumination. Upon further inspection, the technician may find Diagnostic Trouble Code \(DTC\) U0402 setting in the Powertrain Control Module \(PCM\) memory.
- [10223604](https://open.wenmarpro.com/bulletins/10223604), 2022-10-17: Transmission Shift Quality C\-Clutch Snap Ring This bulletin involves removing the transmission, disassembling, and replacing the C\-Clutch snap ring. A small number of customers may experience less than desired shift quality during a 5\-4 downshift and/or Malfunction Indicator Lamp \(MIL\) Illumination. Upon further inspection, the technician may find Diagnostic Trouble Code \(DTC\) U0402 setting in the Powertrain Control Module \(PCM\) memory.
- [10221523](https://open.wenmarpro.com/bulletins/10221523), 2022-09-26: Transmission Shift Quality C\-Clutch Snap Ring This bulletin involves removing the transmission, disassembling, and replacing the C\-Clutch snap ring. A small number of customers may experience less than desired shift quality during a 5\-4 downshift and/or Malfunction Indicator Lamp \(MIL\) Illumination. Upon further inspection, the technician may find Diagnostic Trouble Code \(DTC\) U0402 setting in the Powertrain Control Module \(PCM\) memory.
- [10221517](https://open.wenmarpro.com/bulletins/10221517), 2022-09-26: Transmission Shift Quality C\-Clutch Snap Ring This bulletin involves removing the transmission, disassembling, and replacing the C\-Clutch snap ring. A small number of customers may experience less than desired shift quality during a 5\-4 downshift and/or Malfunction Indicator Lamp \(MIL\) Illumination. Upon further inspection, the technician may find Diagnostic Trouble Code \(DTC\) U0402 setting in the Powertrain Control Module \(PCM\) memory.
- [10217417](https://open.wenmarpro.com/bulletins/10217417), 2022-08-08: Flash: 2.4L Powertrain Diagnostic And System Improvements This bulletin involves reprogramming the Powertrain Control Module \(PCM\) 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 \(DTCs\). 2015 KL Only ? U0402 \- Implausible Data Received From TCM \(ED6\). ? P0116 \- Engine Coolant Temperature Sensor 1 Performance. ? P050D \- Cold Start Rough Idle. ? P2172 \- High Airflow/Vacuum Leak Detected. ? P219A \- Air\-Fuel Ratio Cylinder Imbalance Bank 1 has been set in the PCM. 2014 KL Only ? P2172 \- High Airflow/Vacuum Leak Detected. ? P219A \- Air\-Fuel Ratio Cylinder Imbalance Bank 1 has been set in the PCM. ? P106A \- Cylinder 3 Oil Supply Solenoid Valve Switch Off Time Out Of Range. ? P2251 \- O2 Sensor 1/1 Negative Current Control Circuit Open. ? P0031 \- O2 Sensor 1/1 Heater Circuit Low. In addition, some customers may experience one or more of the following conditions. These conditions apply to 2015 model year vehicles only. ? Cold Engine Startup Flare and Idle Surge \(ED6\). ? Intermittent elevated engine RPM at start up. ? Less than desired gear engagement in lower ambient temperatures. ? Less than desired idle performance.
- [10216179](https://open.wenmarpro.com/bulletins/10216179), 2022-07-25: Flash: 2.4L Powertrain Diagnostic And System Improvements This bulletin involves reprogramming the Powertrain Control Module \(PCM\) 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 \(DTCs\). 2015 KL Only ? U0402 \- Implausible Data Received From TCM \(ED6\). ? P0116 \- Engine Coolant Temperature Sensor 1 Performance. ? P050D \- Cold Start Rough Idle. ? P2172 \- High Airflow/Vacuum Leak Detected. ? P219A \- Air\-Fuel Ratio Cylinder Imbalance Bank 1 has been set in the PCM. 2014 KL Only ? P2172 \- High Airflow/Vacuum Leak Detected. ? P219A \- Air\-Fuel Ratio Cylinder Imbalance Bank 1 has been set in the PCM. ? P106A \- Cylinder 3 Oil Supply Solenoid Valve Switch Off Time Out Of Range. ? P2251 \- O2 Sensor 1/1 Negative Current Control Circuit Open. ? P0031 \- O2 Sensor 1/1 Heater Circuit Low. In addition, some customers may experience one or more of the following conditions. These conditions apply to 2015 model year vehicles only. ? Cold Engine Startup Flare and Idle Surge \(ED6\). ? Intermittent elevated engine RPM at start up. ? Less than desired gear engagement in lower ambient temperatures. ? Less than desired idle performance.
- [10181471](https://open.wenmarpro.com/bulletins/10181471), 2020-10-26: Flash: 2.4L Powertrain Diagnostic And System Improvements This bulletin involves reprogramming the Powertrain Control Module \(PCM\) with the latest available software. Some customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find one or more of the following DTCs: 2015 KL Only · \*\*P0335 \- Crankshaft Position Sensor Circuit.\*\* · P0456 \- EVAP System Small Leak. · P0300 \- Multiple Cylinder Misfire. · P0301 \- Cylinder 1 Misfire. · P0302 \- Cylinder 2 Misfire. · P0303 \- Cylinder 3 Misfire. · P0304 \- Cylinder 4 Misfire. · P2610 \- PCM Internal Engine Off Timer Performance. · P1607 \- PCM Internal Shutdown Timer Rationality. · U0402 \- Implausible Data Received From TCM \(ED6\). · P0116 \- Engine Coolant Temperature Sensor 1 Performance. · P050D \- Cold Start Rough Idle. · P2172 \- High Airflow/Vacuum Leak Detected. · P219A \- Air\-Fuel Ratio Cylinder Imbalance Bank 1 has been set in the PCM. 2014 KL Only · P2172 \- High Airflow/Vacuum Leak Detected. · P219A \- Air\-Fuel Ratio Cylinder Imbalance Bank 1 has been set in the PCM. · P106A \- Cylinder 3 Oil Supply Solenoid Valve Switch Off Time Out Of Range. · P2251 \- O2 Sensor 1/1 Negative Current Control Circuit Open. · P0031 \- O2 Sensor 1/1 Heater Circuit Low. In addition, some customers may experience one or more of the following conditions: · Cold Engine Startup Flare and Idle Surge \(ED6\). · Intermittent elevated engine RPM at start up. · Less than desired gear engagement in lower ambient temperatures. · Less than desired idle performance.