2022 Jeep Wrangler PCM Update for MIL and Fuel System Message

Symptoms

Owners of 2022 Jeep Wrangler vehicles equipped with the 2.0L I4 DOHC DI Turbo Engine W/ESS (Sales Code EC1) may experience a Malfunction Indicator Lamp (MIL) illumination. Additionally, the message "Performance Limited Service Fuel System" may appear and then disappear after a few seconds or minutes in the Instrument Panel Cluster (IPC).

These symptoms are typically accompanied by one or more specific Diagnostic Trouble Codes (DTCs) stored in the vehicle's system. This 2022 Jeep Wrangler PCM update addresses these issues.

Fault Codes / DTCs

The following Diagnostic Trouble Codes (DTCs) may be present in affected vehicles:

Code	Description	Market Applicability
P02EE	Cylinder 1 Injector Circuit Performance	China Only
P02EF	Cylinder 2 Injector Circuit Performance	China Only
P02F0	Cylinder 3 Injector Circuit Performance	China Only
P02F1	Cylinder 4 Injector Circuit Performance	China Only
P2B95	Cold Start Injection Pulse Performance	All Markets
P152E	Engine Hood Switch Two Circuit High	All Markets
P152F	Engine Hood Switch Two Engine Hood Switch One Correlation	All Markets

Diagnosis / Trigger Conditions

To diagnose these issues, technicians will use a Scan Tool, such as wiTECH, to verify that all related systems are functioning correctly. If DTCs or symptom conditions, other than those listed, are present, they must be addressed before proceeding with the bulletin. If the customer's concern matches the symptoms described, the repair procedure outlined in Technical Service Bulletin (TSB) 18-048-24 should be followed.

Repair Procedure Summary

The repair involves reprogramming the Powertrain Control Module (PCM) with the latest available software. This is a software-only update designed to correct the underlying PCM software cause for the reported symptoms and DTCs. After the PCM has been reprogrammed, any Diagnostic Trouble Codes (DTCs) that may have been set in other modules due to the reprogramming process will be cleared using the wiTECH application.

Required Tools or Parts

Technicians will need a wiTECH or equivalent scan tool to perform the PCM reprogramming and clear DTCs.

Important Warnings

• Battery Voltage: When performing the flash process, it is crucial to install a battery charger. Ensure the battery voltage does not drop below 13.2 volts and does not climb above 13.5 volts.
• Interrupted Flash: If the flash process is interrupted or aborted for any reason, it must be restarted from the beginning.
• Technical Issues: Should any issues arise while flashing a module using the wiTECH Diagnostic Application, technicians are advised to submit a ticket to the Helpdesk, which can be found within the wiTECH Help menu.

Owner Action

If your 2022 Jeep Wrangler is experiencing any of the symptoms or DTCs mentioned, it is recommended to visit an authorized Jeep dealership. The dealer will perform the necessary diagnosis and apply the 2022 Jeep Wrangler PCM update as outlined in TSB 18-048-24. This repair is reimbursable within the provisions of the warranty.

Source: NHTSA ID: 11001223