2024-2025 Jeep Compass P0128 Thermostat Stuck Open TSB

Owners of certain 2024-2025 Jeep Compass vehicles may experience issues related to a thermostat stuck open. This condition can trigger a Malfunction Indicator Lamp (MIL) and lead to specific diagnostic trouble codes. Stellantis has released Technical Service Bulletin (TSB) 07-006-24 REV. A to provide technicians with diagnostic and repair procedures for this issue.

This TSB 07-006-24 REV. A, dated August 13, 2024, supersedes a previous version of TSB 07-006-24 issued on August 09, 2024. It also correlates with Rapid Service Update (RSU) 24-112, also dated August 09, 2024. The bulletin applies to vehicles built on and after May 08, 2023, and on or before May 10, 2024.

Symptoms

If your 2024-2025 Jeep Compass is affected by this issue, you may notice one or more of the following symptoms:

• Illumination of the Malfunction Indicator Lamp (MIL) on the dashboard.
• The vehicle's diagnostic system setting the fault code "P0128-00 - Termostato Elétrico - Racionalidade".
• A lack of heat inside the cabin, even when the heater is on.
• The engine running cold, which can be indicated by the temperature gauge or by reduced fuel efficiency.

These symptoms collectively point to a thermostat that is not functioning correctly, specifically remaining in an open position.

Fault Codes / DTCs

The primary diagnostic trouble code associated with this issue is:

Code	Description	Module
P0128-00	Termostato Elétrico - Racionalidade	Engine

This code indicates that the engine coolant temperature is consistently below the thermostat regulating temperature, suggesting the thermostat is stuck open.

Diagnosis

For technicians, the diagnostic process involves verifying the vehicle's applicability. If a customer's VIN is listed in the VIP system or on the RSU VIN list, the repair procedure should be followed. However, even if the vehicle is not on these lists but exhibits the symptoms and sets the "P0128-00" code, the repair procedure for the Jeep Compass P0128 thermostat issue should still be performed.

Repair Procedure Summary

The core repair for this condition involves replacing the faulty thermostat. The detailed steps for this procedure are available in the DealerCONNECT Service Library. Technicians should refer to the specific service procedures under the reference "1088C40 - Valvula termostatica - remocao/recolocacao. incluso procedimentos necessarios" for comprehensive instructions on thermostat removal and replacement.

Required Tools or Parts

To perform this repair, the following parts and tools are specified:

• Thermostat: Part No. 7096849 - SA (includes gasket)
• Engine Coolant: Part No. 68723784AA - NA or 68163849AB (as required)
• Diagnostic Tool: wiTECH or Equivalent

The labor time allocated for this repair is 0.9 hours under Labor Operation No. 07-40-01-93, with a failure code of ZZ and a skill category of 7 - Cooling.

Owner Action

If you own a 2024-2025 Jeep Compass and are experiencing a Malfunction Indicator Lamp (MIL) illumination, a "P0128-00" fault code, or notice your engine running cold with a lack of cabin heat, you should contact your authorized Stellantis dealership. This repair is covered under the provisions of the vehicle's warranty. The dealership will verify if your vehicle is part of the affected population or if it exhibits the symptoms requiring this service action to address the Jeep Compass P0128 thermostat problem.

NHTSA ID: 11006520