# Service bulletin S2603000002

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 11030137
- Published by NHTSA: 2026\-03\-18
- Manufacturer's number: S2603000002
- Manufacturer's date: 2026\-03\-09
- NHTSA component: ENGINE

## NHTSA's summary

Grease is purging from the differential seal.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11030137-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11030137-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine

## Vehicles listed

- 2024 to 2026 DODGE CHARGER
- 2026 JEEP CHEROKEE
- 2024 to 2026 JEEP WAGONEER S

## Other bulletins for the same vehicles and component

- [08\-332\-26 REV. B](/bulletins/11037462.md), 2026-09-23, Service bulletin: ENGINE; ELECTRICAL SYSTEM. Hybrid Cooling Pump Emergency Mode Condition Customers may comment on one or more of the following: SYMPTOM: ● 12V battery is draining. NOTE: The auxiliary heat and battery coolant pumps can enter emergency mode and drain the 12V battery. ● A pump running at full speed noise may be heard from the engine compartment after the vehicle is turned off. This bulletin involves replacing the Auxiliary Heat Pump \(AHP\).
- [9100861 Rev 3](/bulletins/11035994.md), 2026-08-06, Service bulletin: ENGINE. PUMP, Auxiliary Coolant Before replacing the Auxiliary Coolant Pump, please perform the following steps: 1\) Key ON/OFF and let the after\-run pump run for at least 20 minutes before moving on to step \#2. 2\) Inspect the pump connector area for presence of water. 3\) Inspect the pump connector for corrosion. 4\) Inspect the pump for coolant contamination as this can cause the pump to stall. 5\) Inspect battery terminals for damage to rule out a battery drainage issue. 6\) Ensure the PCM is up\-to\-date with the latest available flash. If correct repair is not performed then the claim or condition will be recovered by Warranty Operations.
- [9100861 Rev 1](/bulletins/11035194.md), 2026-07-23, Service bulletin: ENGINE. PUMP, Auxiliary Coolant Before replacing the Auxiliary Coolant Pump, please perform the following steps: 1\) Key ON/OFF and let the after\-run pump run for at least 20 minutes before moving on to step \#2. 2\) Inspect the pump connector area for presence of water. 3\) Inspect the pump connector for corrosion. 4\) Inspect the pump for coolant contamination as this can cause the pump to stall. 5\) Inspect battery terminals for damage to rule out a battery drainage issue. 6\) Ensure the PCM is up\-to\-date with the latest available flash.
- [9100861](/bulletins/11035070.md), 2026-07-18, Service bulletin: ENGINE; ELECTRICAL SYSTEM. PUMP, Auxiliary Coolant Before replacing the Auxiliary Coolant Pump, please perform the following steps: 1\) Key ON/OFF and let the after\-run pump run for at least 20 minutes before moving on to step \#2. 2\) Inspect the pump connector area for presence of water. 3\) Inspect the pump connector for corrosion. 4\) Inspect the pump for coolant contamination as this can cause the pump to stall. 5\) Ensure the PCM is up\-to\-date with the latest available flash. 6\) Inspect battery terminals for damage to rule out a battery drainage issue.
- [9100832](/bulletins/11033959.md), 2026-06-18, Service bulletin: ENGINE; ELECTRICAL SYSTEM. Before replacing the starter, please follow the published diagnostics in the Service Information at 08 \- Electrical / 8F \- Engine Systems / Starting / Diagnosis and Testing / STANDARD STARTING SYSTEM. Updates to this procedure have been recently made and should be followed.
- [18\-022\-26 REV. E](/bulletins/11032977.md), 2026-05-28, Service bulletin: POWER TRAIN; ENGINE. Flash: Powertrain Control Module \(PCM\) Updates Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● P2096\-00 \- Downstream Fuel Trim System 1 Lean. ● P2097\-00 \- Downstream Fuel Trim System 1 Rich. ● P2098\-00 \- Downstream Fuel Trim System 2 Lean. ● P2099\-00 \- Downstream Fuel Trim System 2 Rich. ● P068A\-00 \- ECM Power De\-Energized Performance\-Too Early. NOTE: The above DTCs are being falsely set due to lack of robustness to the diagnostic monitor. ● P121B\-00 \- Active Exhaust Valve 2 Performance. ● P1217\-00 \- Active Exhaust Valve 1 Performance. Customers may also comment on the following: ● Vehicle exhibits a no crank / no start condition. ● Exhaust pitch does not track with acceleration. This bulletin involves inspecting and possibly reprogramming the PCM, TCM and ISCM with the latest available software.
- [08\-137\-26 REV. D](/bulletins/11032975.md), 2026-05-28, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN; ENGINE. Flash: Ignition System Control Module \(ISCM\) Updates Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● P2096\-00 \- Downstream Fuel Trim System 1 Lean. ● P2097\-00 \- Downstream Fuel Trim System 1 Rich. ● P2098\-00 \- Downstream Fuel Trim System 2 Lean. ● P2099\-00 \- Downstream Fuel Trim System 2 Rich. ● P068A\-00 \- ECM Power De\-Energized Performance\-Too Early. NOTE: The above DTCs are being falsely set due to lack of robustness to the diagnostic monitor. Customers may also comment on the following: ● Vehicle exhibits a no crank / no start condition. This bulletin involves inspecting and possibly reprogramming the ISCM, TCM and PCM with the latest available software.
- [112037](/bulletins/11032859.md), 2026-05-20, Service bulletin: ENGINE. MODULE \- IGNITION
- [08\-137\-26 REV. B](/bulletins/11031320.md), 2026-04-15, Service bulletin: ENGINE. Flash: Ignition System Control Module \(ISCM\) Updates Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ? P2096\-00 \- Downstream
- [07\-001\-26](/bulletins/11031220.md), 2026-04-10, Service bulletin: ENGINE. Low Coolant Level Due To Coolant Leak Customers may comment on one or more of the following: SYMPTOM: ● Coolant level is low. ● Coolant is leaking. ● Vehicle is in Turtle mode and exhibits reduced performance. This bulletin involves inspecting, and possibly replacing, the electric pump outlet coolant hose and/or the radiator inlet hose.

JSON: [/v1/bulletins/11030137](/v1/bulletins/11030137)

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