WenmarOpen by Wenmar Pro

Service bulletin 09-009-26

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id11032844
Published by NHTSA2026-05-20
Manufacturer's number09-009-26
Manufacturer's date2026-05-13
NHTSA componentENGINE

NHTSA's summary

PHEV Engine Replacement XC2 Warranty Extension 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): ● P2336 - Cylinder 1 Above Knock/Combustion Vibration Sensor Threshold. ● P2337 - Cylinder 2 Above Knock/Combustion Vibration Sensor Threshold. ● P2338 - Cylinder 3 Above Knock/Combustion Vibration Sensor Threshold. ● P2339 - Cylinder 4 Above Knock/Combustion Vibration Sensor Threshold. The customer may also describe the following: ● A knocking noise from the engine compartment This bulletin involves replacing the engine.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine

Trouble codes named

P2336, P2337, P2338, P2339

Vehicles listed
JEEP GRAND CHEROKEE2023, 2024, 2025
JEEP GRAND CHEROKEE 4XE2023, 2024, 2025 (the catalog's model; the bulletin names a series or trim of it)
JEEP GRAND CHEROKEE L2023, 2024, 2025
JEEP WRANGLER2024, 2025
JEEP WRANGLER 4XE2024, 2025 (the catalog's model; the bulletin names a series or trim of it)

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
20256172025-11-06. Engine
25V7660002025-11-06. ENGINE
24V9260002024-12-12. STRUCTURE:FRAME AND MEMBERS; FUEL SYSTEM, GASOLINE; ENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
S26090000112026-09-17. Service bulletin. MIL-On and/or Engine Oil Leak
9100363 Rev 32026-09-03. Service bulletin. Turbocharger Kit Please note that many turbo components are serviceable separately and full turbo replacement may not be required. If the turbo is being inspected for: Noise/Rattle: Inspect heat shield fasteners for looseness and check the wastegate actuator/linkage for binding. The actuator kit is serviced separately. Oil Leak: Inspect the turbo oil feed O-ring area for leaks. O-ring is serviced separately.
1132412026-07-18. Service bulletin. SPARK PLUG - NONE
1132402026-07-18. Service bulletin. SPARK PLUG - NONE
1132712026-07-18. Service bulletin. CORE – HEATER
1132702026-07-18. Service bulletin. CORE – HEATER
1131532026-07-08. Service bulletin. THERMOSTAT – NONE.
1131522026-07-08. Service bulletin. THERMOSTAT – NONE.
1126392026-07-08. Service bulletin. THROTTLE BODY – NONE
1126402026-07-08. Service bulletin. THROTTLE BODY – NONE