June 15, 2023 Service bulletin

Flash: Powertrain Control Module (PCM) Updates Customers may experience a Malfunction Indicator Lamp (MIL)...

Jeep technical service bulletin 1807023 for 2020 Jeep Wrangler.

Bulletin number: 1807023
Component: Electrical system
Summary: Flash: Powertrain Control Module (PCM) Updates Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that the one or more of the following Diagnostic Trouble Codes (DTCs) have been set: ? P02EE - CYLINDER 1 INJECTOR CIRCUIT PERFORMANCE. ? P02EF - CYLINDER 2 INJECTOR CIRCUIT PERFORMANCE. ? P02F0 - CYLINDER 3 INJECTOR CIRCUIT PERFORMANCE. ? P02F1 - CYLINDER 4 INJECTOR CIRCUIT PERFORMANCE. ? P0335 - Crankshaft Position Sensor Circuit. ? P0339 - Crankshaft Position Sensor Intermittent. ? P2C90 - Crankcase Ventilation System - Hose 9A9 Disconnected . ? P2172 - High Airflow/Vacuum Leak Detected (Instantaneous Accumulation). ? P0441 - EVAP Purge System Performance. ? P0607 - ECU Internal Performance. ? P0506 - Idle Speed Performance Lower Than Expected. The customer may also comment on the following: ? ?Performance Limited Service Fuel System? message in the Instrument Panel Cluster (IPC). This bulletin involves reprogramming the PCM with the latest available software.

Owners of these vehicles have filed 183 complaints in the electrical category.

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