2025 Jeep Compass PCM Update for MIL and Engine Issues

Important Warnings for Owners

It is crucial to note that this Technical Service Bulletin (TSB 18-043-25) is specifically applicable to the South American market and is not applicable to vehicles built for the US Market. Owners in other regions should consult their local dealership for vehicle-specific service information.

For technicians performing the repair, it is essential to install a battery charger to maintain voltage between 13.2 and 13.5 volts during the flash process. Allowing the voltage to drop below or climb above this range can interrupt or abort the software update.

Symptoms You Might Experience

Owners of affected 2025 Jeep Compass vehicles may observe a Malfunction Indicator Lamp (MIL) illumination on the dashboard. Alongside the warning light, you might experience performance issues such as engine power loss or instances where engine acceleration cuts out at times.

Associated Fault Codes (DTCs)

These symptoms are typically accompanied by specific Diagnostic Trouble Codes (DTCs) stored in the vehicle's system. If your 2025 Jeep Compass is exhibiting the described issues, a scan tool may reveal one or more of the following codes:

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 the air-fuel mixture.

Cause of the Problem

The root cause for these issues and the need for a 2025 Jeep Compass PCM update is identified as a software anomaly within the Powertrain Control Module (PCM). This software glitch can lead to incorrect readings or control of the engine's air-fuel mixture and oxygen sensor heater circuit, triggering the MIL and affecting engine performance.

Diagnosis and Trigger Conditions

To diagnose this issue, technicians will use a Scan Tool, such as wiTECH, in conjunction with diagnostic procedures available through DealerCONNECT/Service Library. The first step involves verifying if the vehicle's VIN is included in the Rapid Service Update (RSU) 25-125 list. If the VIN is on the list, or if the vehicle exhibits the symptoms and DTCs mentioned, the repair procedure outlined in TSB 18-043-25 will be followed.

Repair Procedure Summary

The repair for the 2025 Jeep Compass PCM update, as detailed in Technical Service Bulletin 18-043-25, involves a multi-step process:

1. VIN Verification: The technician will first confirm if your vehicle is part of the Rapid Service Update (RSU) 25-125 campaign by checking the VIN.
2. Software Level Check: The current software level of the PCM will be checked. If it's already at the latest version, the bulletin is complete.
3. DTC Clearance: Any existing Diagnostic Trouble Codes will be cleared from the system.
4. PCM Reprogramming: The Powertrain Control Module (PCM) will be reprogrammed with the latest available software using the wiTECH Diagnostic Application. This is the core of the 2025 Jeep Compass PCM update.
5. DTC Re-check: After the software update, the system will be re-evaluated to see if DTCs P0032, P0133, or P0171 are still present.
6. Oxygen Sensor Replacement (If Necessary): If the DTCs persist after the software update, the upstream oxygen sensor (Sonda Lambda Pré-catalisador) will be replaced. Detailed procedures for this replacement are available in the DealerCONNECT Service Library under reference 1080B94.
7. Final DTC Clearance: All remaining DTCs will be cleared from the system.

Required Tools or Parts

For this service, technicians will utilize a wiTECH or Equivalent scan tool for diagnosis and software reprogramming. If an oxygen sensor replacement is necessary, the required part is an Oxygen Sensor (Sonda Lambda Upstream) with part numbers 7099048 - SA or 68755193AA - EMEA.

What Owners Should Do

If you own a 2025 Jeep Compass and are experiencing a Malfunction Indicator Lamp (MIL) illumination, engine power loss, or engine acceleration cuts out at times, especially if you are in the South American market, you should contact your authorized Jeep dealership. Inform them about the symptoms and mention Technical Service Bulletin 18-043-25 (or Rapid Service Update 25-125) to ensure they are aware of the specific repair. All repairs performed under this bulletin are reimbursable within the provisions of warranty.

Important Note on Documentation

After applying this TSB, it is not necessary to send DID-I or DID-A documentation.

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Source: NHTSA ID: 11020626