Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp...
Jeep technical service bulletin 18-034-25 for 2019 Jeep Grand Cherokee.
- Bulletin number
- 18-034-25
- Component
- Electrical system
- Summary
- 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): ● P0420 - Catalyst System Efficiency Below Threshold Bank 1. ● P0430 - Catalyst System Efficiency Below Threshold Bank 2. In addition, the customer may experience one or more of the following: ● Vehicle fails emissions inspection testing due to OBD catalyst monitor readiness. ● Actual fuel economy reporting may not match the Instrument Panel Cluster (IPC). Other software enhancements: ● Calibration update to address EVAP system emissions monitor readiness status accuracy This bulletin involves reprogramming the PCM with the latest available software.
Owners of these vehicles have filed 84 complaints in the electrical category.
Vehicles covered
- Jeep Grand Cherokee 2019 2019
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