2025 Jeep Compass MIL Illumination and Engine Power Loss TSB

Important Warnings for Owners

It's crucial to note that this bulletin applies specifically to the South America market. Owners in other regions may not be affected by this particular service action.

If your vehicle is undergoing the PCM reprogramming procedure, technicians are instructed to install a battery charger. This ensures the battery voltage remains between 13.2 and 13.5 volts. It's important that the charging voltage does not drop below 13.2 volts or climb above 13.5 volts during the flash process. Should the flash process be interrupted or aborted, it must be restarted.

Symptoms of PCM Software Issues

Owners of the 2025 Jeep Compass equipped with the 2.0L I4 DOHC DI Turbo Engine with ESS (Sales Code EC1) may experience a Malfunction Indicator Lamp (MIL) illumination. Alongside the MIL, you might notice specific drivability concerns. These include a general "Engine power loss" or instances where "Engine acceleration cuts out at times."

These symptoms are often accompanied by specific Diagnostic Trouble Codes (DTCs) stored in the vehicle's system.

Fault Codes / DTCs

If your 2025 Jeep Compass is experiencing the symptoms described, a diagnostic scan may reveal one or more of the following DTCs:

Code	Description
P0032-00	Comando Do Aquecedor De Sonda Lambda Pré-catalisador - Circuito Alto
P0133-00	Sonda Lambda Pré-catalisador - Resposta Lenta
P0171-00	Sonda Lambda Pré-catalisador - Mistura Pobre

These codes indicate issues related to the upstream oxygen sensor (Sonda Lambda Pré-catalisador) and its circuit, or a lean fuel mixture condition.

Diagnosis and Trigger Conditions

To accurately diagnose the issue, technicians will use a wiTECH Scan Tool and follow specific diagnostic procedures available in DealerCONNECT/Service Library. They will verify that all related systems are functioning correctly. If other DTCs or symptoms are present, they must be addressed before proceeding with the TSB 18-083-25.

Even if no DTCs are present, the issue can be identified by performing a specific run cycle test. This involves allowing the vehicle to warm up for about two minutes, then maintaining a constant acceleration at 2,500 rpm. Technicians will observe the rpm needle for any unintentional oscillation (around 500 rpm) and listen for corresponding engine sound frequency changes over approximately three seconds.

Repair Procedure Summary

The repair for the 2025 Jeep Compass MIL illumination P0171-00 and related issues involves a multi-step process, outlined in TSB 18-083-25 and Rapid Service Update (RSU) 25-205. First, the technician will confirm if your vehicle's VIN is listed for the RSU. If so, they will check for the presence of DTCs P0032-00, P0133-00, or P0171-00. If these codes are present, or if the RPM oscillation test indicates a problem, the upstream oxygen sensor (Sonda Lambda) may need replacement.

After addressing any oxygen sensor issues, the Powertrain Control Module (PCM) will be reprogrammed with the latest available software. This software update is designed to resolve the underlying cause of the symptoms. Finally, all Diagnostic Trouble Codes (DTCs) will be cleared from the vehicle's modules using the wiTECH application.

Required Tools or Parts

For this service action, specific tools and parts are required:

• Diagnostic Tool: wiTECH or equivalent scan tool.
• Replacement Part (if needed): Upstream Oxygen Sensor (Sonda Lambda). The part numbers are 7099675 (for SA market) and 68763757AA (for EMEA market).

Owner Action

If your 2025 Jeep Compass is exhibiting a Malfunction Indicator Lamp (MIL) illumination, engine power loss, or acceleration cut-outs, especially if you are in the South American market, it is recommended to visit an authorized Jeep dealership. They can verify if your vehicle is covered by TSB 18-083-25 or RSU 25-205.

All repairs performed under this Technical Service Bulletin are reimbursable within the provisions of your vehicle's warranty.

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Source: NHTSA ID: 11024050