"Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp...
Jeep technical service bulletin 18-070-24 for 2023 Jeep Grand Cherokee.
- Bulletin number
- 18-070-24
- Component
- Unknown or other
- Summary
- "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."
Vehicles covered
- Jeep Grand Cherokee 2023 2023
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