# P0300 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 P0300

- [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.
- [10220998](https://open.wenmarpro.com/bulletins/10220998), 2022-09-26: Flash: MIL Illumination P1239, P0298\- Engine Oil Temperature Too Low Or High, P0300 Multiple Cylinder Misfire, Includes Powertrain System Improvements/Enhancements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module \(PCM\) with new software. A small number of customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the Technician may find that the following Diagnostic Trouble Code has been set: P1239 \- Engine Oil Temperature Too Low, set in cold ambient temperatures. P0298 \- Engine Oil Temperature Too High, set in cold ambient temperatures. P0300 \- Multiple Cylinder Misfire, may set at a 1\-2 upshift above 6000 RPM. Possible rough idle when engaging Drive while in 4 LOW after a cold start .The following system improvements have also been included in this software release: Corrected a generic scan tool display issue regarding Mode 6 data accuracy.
- [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.
- [10160077](https://open.wenmarpro.com/bulletins/10160077), 2019-05-20: 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 Diagnostic Trouble Codes \(DTCs\): 2015 KL Only ? 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. These conditions apply to 2015 model year vehicles only.
- [10141271](https://open.wenmarpro.com/bulletins/10141271), 2018-06-18: 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.
- [10139599](https://open.wenmarpro.com/bulletins/10139599), 2018-06-11: Flash: MIL Illumination P1239, P0298\- Engine Oil Temperature Too Low Or High, P0300 Multiple Cylinder Misfire, Includes Powertrain System Improvements/Enhancements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module \(PCM\) with new software. A small number of customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the Technician may find that the following Diagnostic Trouble Code has been set: P1239 \- Engine Oil Temperature Too Low, set in cold ambient temperatures. P0298 \- Engine Oil Temperature Too High, set in cold ambient temperatures. P0300 \- Multiple Cylinder Misfire, may set at a 1\-2 upshift above 6000 RPM. Possible rough idle when engaging Drive while in 4 LOW after a cold start .The following system improvements have also been included in this software release: Corrected a generic scan tool display issue regarding Mode 6 data accuracy.
- [10121870](https://open.wenmarpro.com/bulletins/10121870), 2017-11-03: Flash: Powertrain Diagnostic And System Enhancements This bulletin involves reprogramming the Powertrain Control Module \(PCM\) with the latest available software. The customer may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find, one or more of the following DTCs set in the PCM memory: P0116 \- Coolant Temperature Sensor Performance. P0335 \- Crankshaft Position Sensor Circuit. P2610 \- PCM Internal Engine Off Timer Performance. U1424 \- Implausible Engine Torque Signal Received. P1239 \- Engine Oil Temperature Too Low, set in cold ambient temperatures. P0298 \- Engine Oil Temperature Too High, set in cold ambient temperatures. P0300 \- Multiple Cylinder Misfire, may set at a 1\-2 upshift above 6000 RPM.In addition, some customers may experience one or more of the following conditions: Possible rough idle when engaging Drive while in 4 LOW after a cold start. Corrected a generic scan tool display issue regarding Mode 6 data accuracy.
- [10121677](https://open.wenmarpro.com/bulletins/10121677), 2017-11-03: Flash: Powertrain Diagnostic And System Improvements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module \(PCM\) with new software. A small number of customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find the following Diagnostic Trouble Code \(DTCs\) set in the PCM memory: · \*\*P0335 \- Crankshaft Position Sensor Circuit \(Sales Code ERB\). · P0300 \- Multiple Cylinder Misfire \(Sales Code ERB\). · P0306 \- Cylinder 6 Misfire. With automatic transmission \(Sales Code ERB\) \(Sales Code DGJ\). · P0456 \- EVAP System Small Leak \(Sales Code ERB\).\*\* · P2097\- Downstream Fuel Trim System 1 Rich. · P2099\- Downstream Fuel Trim System 2 Rich. · P0830\- Clutch Pedal Switch ?A? Circuit. With manual transmission \(Sales Code DEH\). · P1239\- Engine Oil Temperature Too Low. · U0140 \- Lost Communication With Body Control Module. · Corrected a generic scan tool display issue regarding Mode 6 data accuracy.
- [10084060](https://open.wenmarpro.com/bulletins/10084060), 2016-11-08: "FLASH: POWERTRAIN DIAGNOSTIC AND SYSTEM ENHANCEMENTS 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 THE FOLLOWING DIAGNOSTIC TROUBLE CODES \(DTCS\) SET IN THE PCM MEMORY: · \*\*P0335 \- CRANKSHAFT POSITION SENSOR CIRCUIT. · P2610 \- PCM INTERNAL ENGINE OFF TIMER PERFORMANCE. · U1424 \- IMPLAUSIBLE ENGINE TORQUE SIGNAL RECEIVED.\*\* · P1239 \- ENGINE OIL TEMPERATURE TOO LOW, SET IN COLD AMBIENT TEMPERATURES. · P0298 \- ENGINE OIL TEMPERATURE TOO HIGH, SET IN COLD AMBIENT TEMPERATURES. · P0300 \- MULTIPLE CYLINDER MISFIRE, MAY SET AT A 1\-2 UPSHIFT ABOVE 6000 RPM. IN ADDITION, SOME CUSTOMERS MAY EXPERIENCE ONE OR MORE OF THE FOLLOWING CONDITIONS: · POSSIBLE ROUGH IDLE WHEN ENGAGING DRIVE WHILE IN 4 LOW AFTER A COLD START. · CORRECTED A GENERIC SCAN TOOL DISPLAY ISSUE REGARDING MODE 6 DATA ACCURACY."