JEEP
18-025-25
Manufacturer communications
- Publication date
- 2025-05-18
- Received by NHTSA
- 2025-05-20
- NHTSA record numbers
- 11018489
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):
• 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:
• **Engine No Start.**
• The rear shafts can be damaged from pressing the accelerator while in gear with the Electronic Parking Brake (EPB) applied.
• Oxygen sensors can give wrong values entering EV mode. False fault detection is possible.
• The Instrument Panel Cluster (IPC) is unable to calculate the instantaneous fuel economy when under heavy acceleration.
• Variable Speed Fuel Pump doesn’t operate after refuel **This bulletin involves inspecting and possibly updating the PCM with the latest available software.**"
• 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:
• **Engine No Start.**
• The rear shafts can be damaged from pressing the accelerator while in gear with the Electronic Parking Brake (EPB) applied.
• Oxygen sensors can give wrong values entering EV mode. False fault detection is possible.
• The Instrument Panel Cluster (IPC) is unable to calculate the instantaneous fuel economy when under heavy acceleration.
• Variable Speed Fuel Pump doesn’t operate after refuel **This bulletin involves inspecting and possibly 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 HighCheck 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 | 2023 |
| Jeep | GRAND CHEROKEE 4XE | 2023 |