2026 Jeep Compass PCM Update for MIL and DTCs

Important Note for U.S. Owners

This Technical Service Bulletin (TSB) 18-084-25, also released as Rapid Service Update (RSU) 25-206, explicitly states that it is not applicable to vehicles built for the U.S. market. This bulletin specifically applies to the South America market. If you are a U.S. owner experiencing similar symptoms, your vehicle may require a different diagnosis or service action.

Symptoms

Owners of affected 2026 Jeep Compass vehicles may observe a Malfunction Indicator Lamp (MIL) illumination on the dashboard. Alongside the MIL, customers might report specific drivability concerns. These include a noticeable engine power loss and instances where engine acceleration cuts out at times. If your Jeep Compass MIL P0032-00 is illuminated, these symptoms are directly related to the conditions addressed by this service bulletin.

Fault Codes / DTCs

When the Malfunction Indicator Lamp (MIL) illuminates, one or more of the following Diagnostic Trouble Codes (DTCs) may be stored in the Powertrain Control Module (PCM):

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 fuel mixture control.

Diagnosis / Trigger Conditions

Before proceeding with any repair, technicians should use a Scan Tool (wiTECH) to verify all related systems are functioning correctly. If other DTCs or symptom conditions are present, they should be addressed first. The presence of DTCs P0032-00, P0133-00, or P0171-00 indicates the vehicle qualifies for this bulletin.

If no DTCs are present but the Jeep Compass MIL P0032-00 symptoms are reported, a specific run cycle test is required. This involves warming up the vehicle for about two minutes, then maintaining a constant acceleration at 2,500 rpm. Technicians should check for any unintentional visible oscillation in the rpm needle (around 500 rpm) and engine sound frequency around three seconds.

Repair Procedure Summary

The repair outlined in Technical Service Bulletin 18-084-25 involves two primary steps, depending on the diagnosis:

1. Oxygen Sensor Replacement: If DTCs P0032-00, P0133-00, or P0171-00 are present, or if the run cycle test indicates an issue, the upstream oxygen sensor may need to be replaced. Detailed procedures for this replacement are available in DealerCONNECT's Service Library under reference 1080B94.
2. PCM Reprogramming: The Powertrain Control Module (PCM) must be reprogrammed with the latest available software. This update addresses potential software-related issues contributing to the symptoms and DTCs. After reprogramming, all stored DTCs in any module should be cleared using the wiTECH application.

Required Tools or Parts

To perform the necessary repairs, technicians will require:

• wiTECH or Equivalent: A diagnostic scan tool for verifying system function, checking DTCs, and reprogramming the PCM.
• Oxygen Sensor: Part number 7099675 (for SA market) or 68763757AA (for EMEA market) for the upstream oxygen sensor (Sonda Lambda).

Important Warnings

• Battery Charger: During the PCM flash process, a battery charger must be installed to ensure the battery voltage remains between 13.2 and 13.5 volts. Do not allow the charging voltage to exceed 13.5 volts.
• Flash Interruption: If the flash process is interrupted or aborted, it must be restarted.
• Failure Codes: Dealers must use the