Technical Service Bulletin (TSB)
Coolant Temperature Sensor Malfunction
REFERENCE:

TSB: 08-115-26
GROUP: 08 - Electrical

Date:

March 18, 2026

VEHICLES
AFFECTED:

2024 - 2025 (H6) Jeep Meridian
2024 - 2025 (M6) Jeep Compass
This bulletin applies to vehicles built on or after November 01, 2025
(MDH 1101XX) and on or before February 16, 2026 (MDH 0216XX)
equipped with the 2.0L I4 Turbo Diesel Engine w/ ESS (Sales Code
EBS).

REVISION: ––

MARKET APPLICABILITY:
NA

MEA

SA

IAP

EE

CH

NOTE: This bulletin applies to
India & Asia Pacific
markets.

CUSTOMER
SYMPTOM:

Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must
exhibit/set the following Diagnostic Trouble Code (DTC):
● P0115-00 - Engine Coolant Temperature Plausibility Check.
Customers may also experience the following:
● Engine overheating warning lamp indicator is illuminated on the Instrument Panel Cluster (IPC).

CAUSE:

Engine Coolant Temperature (ECT) sensor is not properly soldered

This Technical Service Bulletin (TSB) has also been released as a Rapid Service Update (RSU) 26-049,
date of issue March 18, 2026. All applicable RSU VINs have been loaded. To verify this RSU service
action is applicable to the vehicle, use VIP or perform a VIN search in DealerCONNECT/Service Library.
All repairs are reimbursable within the provisions of warranty.
REPAIR SUMMARY:
This bulletin involves inspecting and possibly replacing the ECT sensor.
CLAIMS DATA:

Labor Operation No:
08-14-20-9A

08-14-20-9B

Failure Code

Labor Description
Sensor, Engine Coolant
Temperature - Inspection
(0 - Introduction)
Sensor, Engine Coolant
Temperature - Inspect
and Replace
(0 - Introduction)
ZY

Skill Category
6 - Electrical and Body
Systems

Labor Time
0.9 Hrs.

6 - Electrical and Body
Systems

0.9 Hrs.

Service Action

J08 FSAR-RSU-7139

-2-

SPARE PARTS:

Qty
1 (AR)
(AR)

Part No.
MOPAR - 68122824AA
EMEA - 55203964
MOPAR - 68163848GB
EMEA - 59117409

Description
Sensor, Temperature

Notes

Mopar Antifreeze/Coolant
10 Year 150,000 Mile
Formula OAT

SPECIAL TOOLS/EQUIPMENT:

Description
wiTECH or Equivalent

Ref. No.
-

Notes
-

DIAGNOSIS:
Using a Scan Tool (wiTECH) with the appropriate Diagnostic Procedures available in DealerCONNECT/
Service Library, verify all related systems are functioning as designed. If DTCs or symptom conditions, other
than the ones listed above are present, record the issues on the repair order and repair as necessary before
proceeding further with this bulletin.
If a customers VIN is listed in VIP or your RSU VIN list, perform the repair. If any vehicle not on the VIN list
exhibits any of the symptom listed above in the customer symptom section, perform the Repair Procedure.
REPAIR PROCEDURE:
1. Remove the battery tray. Refer to the detailed service procedures available in DealerCONNECT/Service
Library under: Service Info> 08 - Electrical / 8F - Engine Systems / Battery System / Tray, Battery /
Removal.

-32. Remove the Diesel Particulate Filter (DPF) pressure sensor bolt Fig. 1.

Fig. 1
DPF Sensor Removal
1 - DPF Sensor Bolt
2 - DPF Sensor

3. Position aside the DPF pressure sensor.
4. Disconnect the ECT sensor wire harness connector Fig. 2.

Fig. 2
ECT Sensor Removal
1 - ECT Sensor Wire Harness Connector
2 - ECT Sensor

5. Remove the ECT sensor Fig. 2.
6. Inspect the ECT sensor batch code located on the brass nut Fig. 3.

J08 FSAR-RSU-7139

J08 FSAR-RSU-7139

-4-

Fig. 3
ECT Sensor Batch Code Location
7. Does the batch code on the brass ETC sensor matching any of the following batch code numbers listed
below?
● 25W10
● 25W36
● 25W37
● YES>>> Proceed to Step 8.
● NO>>> This bulletin has been completed. Use Inspection LOP (08-14-20-9A) to close the active RSU
and proceed to Step 9
8. Obtain a NEW ECT sensor.
9. Install the ECT sensor and tighten the ECT sensor bolt to 22 N·m (16 ft. lbs.).
10. Install the DPF pressure sensor and tighten the sensor bolt to 9 N·m (80 in. lbs.) Fig. 4.

Fig. 4
Install DPF Pressure Sensor
1 - Tighten DPF Pressure Sensor Bolt
2 - DPF Pressure Sensor

11. Install the battery tray. Refer to the detailed service procedures available in DealerCONNECT/Service
Library under: Service Info> 08 - Electrical / 8F - Engine Systems / Battery System / Tray, Battery /
Installation.
12. If necessary, top off the cooling system.
13. Clear DTCs.

-5-

J08 FSAR-RSU-7139

POLICY:
Reimbursable within the provisions of the warranty.
This bulletin is supplied as technical information only and is not an authorization for repair. No part of this publication may be reproduced, stored in a retrieval system, or
transmitted, in any form or by any means, electronic, mechanical, photocopying, or otherwise, without written permission of FCA US LLC.