JEEP
08-088-25 REV. A
Manufacturer communications
- Publication date
- 2025-04-30
- Received by NHTSA
- 2025-05-06
- NHTSA record numbers
- 11017958
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:
• **U0168 - Lost Communication With Vehicle Security Control Module.**
• P0629 - Fuel Pump Control Circuit High.
• P0171 - Fuel system Lean.
• P0087 - Fuel Rail Pressure Too Low - Bank 1. Customers may also experience one or more of the following:
• **Vehicle not starting.**
• Variable speed fuel pump doesn't start after refueling.
• The Instrument Panel Cluster (IPC) unable to calculate the instantaneous fuel economy under heavy acceleration.
• The oxygen sensor can give incorrect values when entering Electric Vehicle (EV) mode. False fault detection is possible when this event occurs.
• The rear half shafts are damaged due to accelerating in drive with the Electronic Parking Brake (EPB) applied. **In addition, the following software enhancement is available:
• Improve robustness against false failures for P219A - Bank 1 Air-Fuel Ratio Imbalance.** This bulletin involves updating the PCM with the latest available software."
• **U0168 - Lost Communication With Vehicle Security Control Module.**
• P0629 - Fuel Pump Control Circuit High.
• P0171 - Fuel system Lean.
• P0087 - Fuel Rail Pressure Too Low - Bank 1. Customers may also experience one or more of the following:
• **Vehicle not starting.**
• Variable speed fuel pump doesn't start after refueling.
• The Instrument Panel Cluster (IPC) unable to calculate the instantaneous fuel economy under heavy acceleration.
• The oxygen sensor can give incorrect values when entering Electric Vehicle (EV) mode. False fault detection is possible when this event occurs.
• The rear half shafts are damaged due to accelerating in drive with the Electronic Parking Brake (EPB) applied. **In addition, the following software enhancement is available:
• Improve robustness against false failures for P219A - Bank 1 Air-Fuel Ratio Imbalance.** This bulletin involves updating 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
P0087Fuel Rail Pressure Too Low - Bank 1Jeep
P0171Fuel system LeanJeep
P0629Fuel Pump Control Circuit HighJeep
U0168Lost Communication With Vehicle Security Control ModuleCheck 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 CHEROKEE | 2024 |
| Jeep | GRAND CHEROKEE 4XE | 2024 |
| Jeep | GRAND CHEROKEE L | 2024 |