June 10, 2023 Service bulletin

Flash: Hybrid Control Processor (HCP) Updates The customer may experience a Malfunction Indicator Lamp...

Jeep technical service bulletin 0814423 for 2018 Jeep Wrangler.

Bulletin number: 0814423
Component: Electrical system: propulsion system: hybrid management: power control unit/module (HPCU)
Summary: Flash: Hybrid Control Processor (HCP) Updates The customer may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes (DTCs): ? P0C01-00 - Drive Motor A Current High. ? P0C05-00 - Drive Motor A Phase U-V-W Circuit/Open. ? P0507 - Idle Speed Performance Higher Than Expected. In addition the customer may notice the following: ? Loss of 12V charging (Battery Light) and/or loud noise from MGU motor. This bulletin involves updating the HCP with the latest available software and if necessary replacing the Motor Generator Unit (MGU).

Owners of these vehicles have filed 269 complaints in the electrical category.

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