2025-2026 Jeep Compass Coolant Sensor Malfunction TSB

Owners of certain 2025-2026 Jeep Compass vehicles may encounter a Malfunction Indicator Lamp (MIL) illumination or an engine overheating warning. This issue is linked to Diagnostic Trouble Code (DTC) P0115-00, indicating an Engine Coolant Temperature (ECT) sensor malfunction. Technical Service Bulletin (TSB) 08-115-26, revision A, issued on March 25, 2026, provides diagnostic and repair procedures for this condition.

This bulletin supersedes a previous version of TSB 08-115-26 dated March 18, 2026, and includes updated model years and build dates. It has also been released as Rapid Service Update (RSU) 26-049.

Symptoms of a Faulty ECT Sensor

If your 2025-2026 Jeep Compass coolant temperature sensor malfunction is present, you may observe the following:

• Illumination of the Malfunction Indicator Lamp (MIL).
• The vehicle may set Diagnostic Trouble Code P0115-00.
• An "Engine overheating warning lamp indicator is illuminated on the Instrument Panel Cluster (IPC)" may appear.

The root cause for these symptoms is an Engine Coolant Temperature (ECT) sensor that is not properly soldered.

Diagnostic Trouble Code (DTC)

The primary fault code associated with the 2025 Jeep Compass coolant temperature sensor malfunction is:

• P0115-00: Engine Coolant Temperature Plausibility Check

Diagnosis Process

Technicians should use a Scan Tool, such as wiTECH, to verify that all related systems are functioning correctly. If any DTCs or symptom conditions other than those listed in TSB 08-115-26 are present, these should be recorded and addressed before proceeding with the bulletin's repair.

If your vehicle's VIN is listed in the VIP system or on the RSU VIN list, the repair should be performed. Even if the VIN is not on the list, but the vehicle exhibits the symptoms described, the repair procedure should still be followed.

Repair Procedure Summary

The repair for the 2025 Jeep Compass coolant temperature sensor malfunction involves inspecting and potentially replacing the ECT sensor. The general steps are:

1. Remove the battery tray to gain access.
2. Remove the Diesel Particulate Filter (DPF) pressure sensor bolt and position the sensor aside.
3. Disconnect the wire harness connector from the ECT sensor.
4. Remove the existing ECT sensor.
5. Inspect the batch code on the brass nut of the ECT sensor. If the batch code matches 25W10, 25W36, or 25W37, a new ECT sensor is required. If it does not match, the bulletin is considered complete, and the inspection labor operation (08-14-20-9A) should be used.
6. Obtain and install a new ECT sensor, tightening it to 22 N·m (16 ft. lbs.).
7. Reinstall the DPF pressure sensor, tightening its bolt to 9 N·m (80 in. lbs.).
8. Reinstall the battery tray.
9. Top off the cooling system if necessary.
10. Clear any stored DTCs.

Required Parts and Tools

To perform this repair, the following parts and tools may be needed:

• Sensor, Temperature: MOPAR - 68122824AA (or EMEA - 55203964)
• Mopar Antifreeze/Coolant: MOPAR - 68163848GB (or EMEA - 59117409) for topping off the cooling system.
• Special Tool: wiTECH or an equivalent scan tool.

Important Information for Owners

This TSB 08-115-26 specifically notes that it applies to India and Asia Pacific markets. While the NHTSA document links to 2025-2026 Jeep Compass models, owners should verify applicability with their local dealership. All repairs performed under this bulletin are reimbursable within the provisions of your vehicle's warranty.

Owner Action

If you experience a Malfunction Indicator Lamp, an engine overheating warning, or suspect a 2025 Jeep Compass coolant temperature sensor malfunction, contact your authorized Jeep dealership. Provide them with your vehicle's information and mention TSB 08-115-26 or RSU 26-049 for proper diagnosis and repair.

NHTSA ID: 11030408