P1239 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.
This code is specific to a manufacturer and is not described here. Its meaning is in the manufacturer's service information.
| 1803114 | 2022-09-26. Service bulletin. 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. |
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| 18-031-14 | 2022-08-29. Service bulletin. Flash: MIL Illumination P1239- Engine Oil Temperature Too Low. 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 The following system improvements have also been included in this software release: ? Corrected a generic scan tool display issue regarding Mode 6 data accuracy |
| 18-031-14 | 2022-08-22. Service bulletin. Flash: MIL Illumination P1239- Engine Oil Temperature Too Low. 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 The following system improvements have also been included in this software release: ? Corrected a generic scan tool display issue regarding Mode 6 data accuracy |
| 18-031-14 | 2018-06-11. Service bulletin. Flash: MIL Illumination P1239- Engine Oil Temperature Too Low. 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 The following system improvements have also been included in this software release: ? Corrected a generic scan tool display issue regarding Mode 6 data accuracy |
| 18-031-14 REV. A | 2018-06-11. Service bulletin. 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. |
| 18-093-16 REV. A | 2017-11-03. Service bulletin. 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. |
| 18-060-16 | 2017-11-03. Service bulletin. 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. |
| 18-093-16 | 2016-11-08. Service bulletin. "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." |
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.