# Service bulletin 112639

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: 11034912
- Published by NHTSA: 2026\-07\-08
- Manufacturer's number: 112639
- Manufacturer's date: 2026\-06\-30
- NHTSA component: ENGINE

## NHTSA's summary

THROTTLE BODY – NONE

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11034912-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11034912-9999.pdf)

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

## Components

Engine

## Vehicles listed

- 2022 to 2023 ALFA ROMEO TONALE
- 2025 to 2026 ALFA ROMEO TONALE
- 2024 ALFA ROMEO TONALE PHEV
- 2023 to 2025 DODGE HORNET
- 2026 DODGE HORNET
- 2019 to 2026 JEEP COMPASS
- 2019 to 2026 JEEP GRAND CHEROKEE
- 2021 to 2026 JEEP GRAND CHEROKEE 4XE
- 2021 to 2026 JEEP GRAND CHEROKEE L
- 2019 to 2026 JEEP WRANGLER
- 2020 to 2026 JEEP WRANGLER 4XE

## Recalls for the same vehicles and component

- [2025617](/recalls/tc/2025617.md), 2025-11-06: Engine
- [25V766000](/recalls/nhtsa/25V766000.md), 2025-11-06: ENGINE
- [24V926000](/recalls/nhtsa/24V926000.md), 2024-12-12: STRUCTURE:FRAME AND MEMBERS; FUEL SYSTEM, GASOLINE; ENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY
- [2023338](/recalls/tc/2023338.md), 2023-06-08: Engine
- [23V412000](/recalls/nhtsa/23V412000.md), 2023-06-08: ENGINE
- [23V411000](/recalls/nhtsa/23V411000.md), 2023-06-08: ENGINE AND ENGINE COOLING
- [22V865000](/recalls/nhtsa/22V865000.md), 2022-11-23: ENGINE
- [2022584](/recalls/tc/2022584.md), 2022-10-14: Engine
- [22V767000](/recalls/nhtsa/22V767000.md), 2022-10-13: ENGINE; FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP
- [2022217](/recalls/tc/2022217.md), 2022-04-28: Engine

## Other bulletins for the same vehicles and component

- [66D Combo Rev2](/bulletins/11038554.md), 2026-10-16, Service campaign: ENGINE. Revised Customer Satisfaction Notification 66D – Spark Plugs \- Dealer Notification
- [18\-081\-26](/bulletins/11038538.md), 2026-10-16, Service bulletin: ENGINE. Not applicable to vehicles built for US market. Flash: Powertrain Control Module \(PCM\) Updates Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle may SYMPTOM: exhibit/set the following Diagnostic Trouble Code \(DTC\): ● P0607 \- Control Module Performance. Customers may also comment on one or more of the following: ● The vehicle will not start until the ignition is cycled for a second time. ● Engine malfunction \(injection\) warning lamp illuminated in the Instrument Panel Cluster \(IPC\). This bulletin involves reprogramming the PCM with the latest available software.
- [66D Combo Rev2](/bulletins/11038517.md), 2026-10-16, Service campaign: ENGINE. Revised Customer Satisfaction Notification 66D – Spark Plugs \- Dealer Notification
- [18\-081\-26](/bulletins/11038501.md), 2026-10-16, Service bulletin: ENGINE. Not applicable to vehicles built for US market. Flash: Powertrain Control Module \(PCM\) Updates Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle may SYMPTOM: exhibit/set the following Diagnostic Trouble Code \(DTC\): ● P0607 \- Control Module Performance. Customers may also comment on one or more of the following: ● The vehicle will not start until the ignition is cycled for a second time. ● Engine malfunction \(injection\) warning lamp illuminated in the Instrument Panel Cluster \(IPC\). This bulletin involves reprogramming the PCM with the latest available software.
- [09\-013\-26 REV. A](/bulletins/11038310.md), 2026-10-07, Service bulletin: ENGINE. Engine Runs Rough Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle may SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● P0300\-00 \- Random/Multiple Cylinder Misfire Detected. ● P0301\-00 \- Cylinder 1 Misfire. ● P0302\-00 \- Cylinder 2 Misfire. ● P0303\-00 \- Cylinder 3 Misfire. ● P0304\-00 \- Cylinder 4 Misfire. Customers may also comment on the following: ● Engine runs rough. This bulletin involves replacing all four main chamber spark plugs.
- [21\-061\-26](/bulletins/11037572.md), 2026-09-30, Service bulletin: POWER TRAIN; ENGINE. Not applicable to vehicles built for US market. Park Lock Piston Leaking Customers may comment on the following: SYMPTOM: ● Power loss \- jerking while driving that may result in the engine being unable to restart after a stop if fault code P0B0C 7A is present.
- [09\-023\-26](/bulletins/11037570.md), 2026-09-30, Service bulletin: ENGINE. Umbrella Valve Seal Missing From Cylinder Head Cover Vehicle may exhibit a MIL\-ON. SYMPTOM: Upon inspection the technician may find that one or more of the following Diagnostic Trouble Codes \(DTCs\) have set: ● P0300\-00 \- Random/Multiple Cylinder Misfire Detected. ● P0301\-00 \- Cylinder 1 Misfire. ● P0302\-00 \- Cylinder 2 Misfire. ● P0303\-00 \- Cylinder 3 Misfire. ● P0304\-00 \- Cylinder 4 Misfire. This bulletin involves inspecting for a missing umbrella valve seal on the underside of the cylinder head cover and, if necessary, replacing the cylinder head cover.
- [S2609000011](/bulletins/11037354.md), 2026-09-17, Service bulletin: ENGINE. MIL\-On and/or Engine Oil Leak
- [09\-010\-26 REV. B](/bulletins/11037278.md), 2026-09-10, Service bulletin: ENGINE. Not applicable to vehicles built for US market. Oil Leak Through The Rear Crankshaft Oil Seal \(Flywheel Side\) Customers may comment on the following: ● Oil Pressure warning light illuminates. ● Engine oil is leaking onto the floor beneath the vehicle This bulletin involves inspecting for oil leaks and if necessary replacing the rear crankshaft oil seal \(flywheel side\)
- [09\-022\-26](/bulletins/11037275.md), 2026-09-10, Service bulletin: ENGINE. Not applicable to vehicles built for US market. Right Engine Insulator Noise \*\*Customers may comment on the following:\*\* SYMPTOM: ● Metallic clicking noises when when moving the vehicle forward and reverse. \*\*This bulletin involves replacing the right engine insulator.\*\*

JSON: [/v1/bulletins/11034912](/v1/bulletins/11034912)

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