JEEP
18-070-24
Manufacturer communications
- Publication date
- 2024-09-14
- Received by NHTSA
- 2024-09-17
- NHTSA record numbers
- 11007849
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 (DTC)s have been set:
• P0629 - Fuel Pump Control Circuit High.
• P0171 - Fuel system Lean.
• P0087 - Fuel Rail Pressure Too Low - Bank 1. Customers may also experience the following:
• Vehicle will not start.
• The Instrument Cluster Panel (ICP) unable to calculate the instantaneous fuel economy under heavy acceleration.
• The oxygen sensor can give incorrect values when entering EV mode. False fault detection (MIL on) is possible when this event occurs.
• The rear half shafts are damaged due to accelerating in drive with the Electronic Parking Brake (EPB) applied. This bulletin involves 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. Customers may also experience the following:
• Vehicle will not start.
• The Instrument Cluster Panel (ICP) unable to calculate the instantaneous fuel economy under heavy acceleration.
• The oxygen sensor can give incorrect values when entering EV mode. False fault detection (MIL on) is possible when this event occurs.
• The rear half shafts are damaged due to accelerating in drive with the Electronic Parking Brake (EPB) applied. 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 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 |