JEEP
18-086-24
Manufacturer communications
- Publication date
- 2024-12-11
- Received by NHTSA
- 2024-12-18
- NHTSA record numbers
- 11011903
Manufacturer summary
Original wording in English
"Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs):
• **P0325 - Knock/Combustion Vibration Sensor ""A"" Circuit.
• P0330 - Knock/Combustion Vibration Sensor ""B"" Circuit.
• P0300 - Multiple Cylinder Misfire. (NA Market Only)
• P032A - Knock/Combustion Vibration Sensor ""C"" Circuit.
• P018B - Fuel Pressure Sensor ""B"" Circuit Rang/Performance.
• P1CEA - Boost Side EVAP Purge System Performance. (NA Market Only)**
• P00F3 - Humidity Sensor Circuit Range/Performance.
• P06DD - Engine Oil Pressure Control Circuit Performance/Stuck Off.
• P00C6 - Fuel Rail Pressure Too Low - Engine Cranking. Customers may also comment on one or more of the following:
• **Low oil pressure Instrument Cluster Panel (IPC) warning during heavy towing.
• Engine RPM dip below idle speed during coast down to idle.**
• Undesirable vehicle drivability behavior causing a vehicle Shift to Park event during Engine Stop Start (ESS) while Adaptive Cruise Control (ACC) is active.
• Idle speed oscillations observed when in Snow and Mud modes for vehicle configured with 4x2 drivetrain.
• Screen two incorrectly pops up on the IPC for five seconds during Terrain and Rock mode.
• Fully Autonomous Parking Assist (FAPA) is not deactivated when the accelerator pedal is pressed.
• Vehicle is not heating up fast enough at freezing temperatures. **The following software calibration improvements are also available:
• Engine mega knock detection.
• Misfire during cold start.
• Avoid false failures with MIL on. (NA Market Only)** This bulletin involves reprogramming the PCM with the latest available software."
• **P0325 - Knock/Combustion Vibration Sensor ""A"" Circuit.
• P0330 - Knock/Combustion Vibration Sensor ""B"" Circuit.
• P0300 - Multiple Cylinder Misfire. (NA Market Only)
• P032A - Knock/Combustion Vibration Sensor ""C"" Circuit.
• P018B - Fuel Pressure Sensor ""B"" Circuit Rang/Performance.
• P1CEA - Boost Side EVAP Purge System Performance. (NA Market Only)**
• P00F3 - Humidity Sensor Circuit Range/Performance.
• P06DD - Engine Oil Pressure Control Circuit Performance/Stuck Off.
• P00C6 - Fuel Rail Pressure Too Low - Engine Cranking. Customers may also comment on one or more of the following:
• **Low oil pressure Instrument Cluster Panel (IPC) warning during heavy towing.
• Engine RPM dip below idle speed during coast down to idle.**
• Undesirable vehicle drivability behavior causing a vehicle Shift to Park event during Engine Stop Start (ESS) while Adaptive Cruise Control (ACC) is active.
• Idle speed oscillations observed when in Snow and Mud modes for vehicle configured with 4x2 drivetrain.
• Screen two incorrectly pops up on the IPC for five seconds during Terrain and Rock mode.
• Fully Autonomous Parking Assist (FAPA) is not deactivated when the accelerator pedal is pressed.
• Vehicle is not heating up fast enough at freezing temperatures. **The following software calibration improvements are also available:
• Engine mega knock detection.
• Misfire during cold start.
• Avoid false failures with MIL on. (NA Market Only)** This bulletin involves reprogramming the PCM with the latest available software."
Reported code forms
Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
Jeep
P00C6Fuel Rail Pressure Too Low - Engine CrankingJeep
P00F3Humidity Sensor Circuit Range/PerformanceJeep
P018BFuel Pressure Sensor ""B"" Circuit Rang/PerformanceJeep
P0300Multiple Cylinder MisfireJeep
P0325Knock/Combustion Vibration Sensor ""A"" CircuitJeep
P032AKnock/Combustion Vibration Sensor ""C"" CircuitJeep
P0330Knock/Combustion Vibration Sensor ""B"" CircuitJeep
P06DDEngine Oil Pressure Control Circuit Performance/Stuck OffJeep
P1CEABoost Side EVAP Purge System PerformanceCheck vehicle applicability
A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Jeep | GRAND WAGONEER | 2024 |
| Jeep | WAGONEER | 2024 |