April 29, 2021 Service bulletin

Flash: Powertrain Control Module (PCM) Updates

Jeep technical service bulletin 18-041-21 for 2020 Jeep Compass.

Bulletin number: 18-041-21
Component: Electrical system
Summary: Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers 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) have been set: P0563-00 - System Voltage High (M6 Vehicles only). P21CC-00 - Reductant Control Module Supply Voltage High (M6 Vehicles only). P20F6-00 - Reductant Injection Valve Stuck Open Bank 1 Unit 1. P208E-00 - Reductant Injector Stuck Closed - Bank 1 Unit 1. P24B2-00 - Particulate Matter Sensor Circuit Intermittent. P00C0-00 - Turbocharger-Supercharger Bypass Valve 2 Control Circuit. Additional customer concerns:Engine Stop/Start (ESS) not functioning properly. Four wheel drive not functioning. Additional enhancement included in this software:Improvement for the auxiliary coolant pump to help prevent stuck injection valve. Calibration update for proper engine operation.

Owners of these vehicles have filed 66 complaints in the electrical category.

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