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JEEP

18-001-24 REV. C

Manufacturer communications

Publication date
2024-09-07
Received by NHTSA
2024-09-10
NHTSA record numbers
11007658

Manufacturer summary

Original wording in English

"Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician must find one or more of the following Diagnostic Trouble Codes (DTCs) have been set:
• **P0629 - Fuel Pump Control Circuit High.
• P0171 - Fuel system Lean.
• P0087 - Fuel Rail Pressure Too Low - Bank 1.**
• P16F0-00 - SPI Comm Hardware Fault. Customers may also experience one or more of the following:
• **The rear half shafts are damaged due to pressing the accelerator in drive with the Electric Parking Brake (EPB) applied.
• The Oxygen Sensor (02) can give wrong values when entering EV mode, triggering a false MIL.
• The Instrument Cluster Panel (ICP) unable to calculate the instantaneous fuel economy under heavy acceleration.
• Variable Speed Fuel Pump inoperative after refueling (no start).**
• Intelligent sign recognition is not working properly causing degradation in active speed limiting functionality (IAP Only).
• Shifts rough occasionally when coming down to a stop.
• Shifts rough occasionally when accelerating.
• Shifts rough when transitioning from EV to Hybrid operation on low SoC.
• Shifts rough when engines starts.
• On part throttle accelerations with little to no battery available the transition from battery power to engine on is harsh and abrupt.
• The engine oil life on dashboard drops down too fast when the engine oil dilution reaches high level without the ability to recover. This bulletin involves reprogramming the PCM, Transmission Control Module (TCM) and the Auxiliary Hybrid Control Processor (AHCP) also known as Power Inverter Module (PIM), with the latest available software."

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MakeModelModel year
JeepGRAND CHEROKEE2023

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