2022-2025 Jeep Compass MIL P1D3E P1D40 TSB

Owners of 2022-2025 Jeep Compass vehicles equipped with a 2.0L I4 Turbo Diesel Engine (Sales Code EBT) may experience a Malfunction Indicator Lamp (MIL) illumination on their dashboard. This issue is typically accompanied by specific Diagnostic Trouble Codes (DTCs) related to internal Powertrain Control Module (PCM) faults. Technical Service Bulletin (TSB) 18-066-24 addresses this concern by providing a software update for the PCM.

This bulletin applies to vehicles built on or before June 17, 2024 (MDH 0617XX) and is applicable in various markets including North America (NA), South America (SA), Eastern Europe (EE), and China (CH).

Symptoms

If your 2022-2025 Jeep Compass is affected, you will notice the Malfunction Indicator Lamp (MIL) illuminated on your instrument cluster. This warning light indicates that the vehicle's engine control system has detected a fault. Alongside the MIL, diagnostic scans will reveal specific fault codes stored in the vehicle's computer system, pointing to an internal issue within the PCM. The presence of a Jeep Compass MIL P1D3E P1D40 condition indicates a need for this software update.

Fault Codes / DTCs

The primary diagnostic trouble codes associated with this issue are:

Code	Description	Module
P1D3E	"Central De Controle De Injeção (ECM) - Monitoramento Interno 1 - Falha Interna No Sistema."	ECM
P1D40	"Central De Controle De Injeção (ECM) - Monitoramento Interno 3 - Falha Eletrônica Interna."	ECM

These codes indicate internal monitoring failures within the Engine Control Module (ECM), which is part of the PCM. The cause of these specific DTCs is identified as a software anomaly within the PCM.

Diagnosis / Trigger Conditions

To accurately diagnose this condition, a technician will use a Scan Tool, such as the wiTECH system, along with the diagnostic procedures available in DealerCONNECT/Service Library. It is crucial to verify that all related systems are functioning correctly. If any other DTCs or symptom conditions are present, they must be addressed and repaired before proceeding with the PCM software update. The presence of the Jeep Compass MIL P1D3E P1D40 codes, coupled with the illuminated MIL, confirms the need for this bulletin's repair procedure.

Repair Procedure Summary

The repair for the Jeep Compass MIL P1D3E P1D40 issue involves reprogramming the Powertrain Control Module (PCM) with the latest available software. This is a critical step to correct the internal software fault. The process is as follows:

1. Prepare the Vehicle: Before initiating the reprogramming, a battery charger must be connected to the vehicle. This ensures that the battery voltage remains stable, specifically between 13.2 and 13.5 volts, throughout the entire flash process. Maintaining stable voltage is crucial to prevent interruptions or failures during the software update.
2. Reprogram the PCM: The technician will use the wiTECH Diagnostic Application to flash the PCM with the newest software version. If any issues arise during this process, such as an interruption or an aborted flash, the procedure must be restarted. Technical support is available via the Helpdesk if persistent problems occur.
3. Clear DTCs: After the PCM has been successfully reprogrammed, all Diagnostic Trouble Codes that may have been set in any module due to the reprogramming process must be cleared. The wiTECH application is designed to automatically present all such DTCs, allowing the technician to clear them efficiently.

Required Tools or Parts

The primary tool required for this repair is the wiTECH or Equivalent diagnostic system. This specialized scan tool is necessary to perform the PCM reprogramming and clear any stored DTCs.

Important Warnings

During the PCM reprogramming process, it is critical to install a battery charger to ensure the battery voltage does not drop below 13.2 volts. The charging voltage must not climb above 13.5 volts. If the flash process is interrupted or aborted for any reason, it must be restarted from the beginning to ensure proper software installation.

Owner Action

If your 2022-2025 Jeep Compass is exhibiting a Malfunction Indicator Lamp (MIL) illumination and you suspect it might be related to the Jeep Compass MIL P1D3E P1D40 fault codes, you should schedule an appointment with an authorized Jeep dealership. The dealership technicians have the necessary diagnostic tools (wiTECH) and access to the latest software updates to perform the PCM reprogramming as described in TSB 18-066-24. This repair is typically reimbursable within the provisions of your vehicle's warranty.

NHTSA ID: 11006210