Jeep bulletin 18-047-26
What it saysFlash: Powertrain Control Module (PCM) 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… NHTSA’s full summary ↓
Jeep filed this with NHTSA as a service bulletin dated Apr 17, 2026, received Apr 22, 2026, about the power train. It names 1 model year (2022). A service bulletin is not a safety recall: it is the manufacturer telling its dealers how to diagnose or repair a condition, and whether the work is paid for depends on the warranty in force. Quoting the number at a service desk can save a diagnosis.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationFlash: Powertrain Control Module (PCM) 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): ● P0300 - Multiple Cylinder Misfire (Active or Stored status set during cold start catalyst heating). ● P0301 - Cylinder 1 Misfire (Active or Stored status set during cold start catalyst heating). ● P0302 - Cylinder 2 Misfire (Active or Stored status set during cold start catalyst heating). ● P0303 - Cylinder 3 Misfire (Active or Stored status set during cold start catalyst heating). ● P0304 - Cylinder 4 Misfire (Active or Stored status set during cold start catalyst heating). ● P0305-00 - Cylinder 5 Misfire (Active or Stored status set during cold start catalyst heating). ● P0306-00 - Cylinder 6 Misfire (Active or Stored status set during cold start catalyst heating). Customers may also comment on one or more of the following: ● The vehicle has a rough idle. ● The engine has a miss. ● Noisy valvetrain. This bulletin involves reprogramming the PCM with the latest available software.
Trouble codes it names: P0300 P0301 P0302 P0303 P0304
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 18-047-26 | Service bulletin | Apr 17, 2026 | 11031452 | not found |
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5. One communication is usually filed as several documents — the bulletin, a dealer notice, an owner letter — and the number on any of them finds this page. A PDF link is shown only once NHTSA’s own server has been seen to serve that document; the rest are checked over the following nights. Quote the number at a service desk; it is what the dealer’s system is keyed on.
Model years it names
Source: as the manufacturer filed themA vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
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What owners reported
Source: NHTSA complaint databaseOwners of the 1 model year this bulletin names have filed 400 complaints with NHTSA since 2015. 156 of them name Engine, Power Train — the same broad component group this bulletin is filed under. NHTSA groups complaints coarsely, so that means the same area of the vehicle, not necessarily the same fault.
Svc 4wd light went on in the car after start-up, and i tried to reverse from my parking spot with the wheel turned and it felt like the emergency brakes were on. I stopped to check and they were not. i tried to reverse again and the car starts making a grinding noise and jerking motion as it pulls out slowly.
2022 Jeep Wrangler · Power Train · filed with NHTSA Oct 27, 2022
Vehicle would not start. Drove to a distant High School. Parked. Went to leave and the vehicle will not start. I had to have the vehicle towed to the dealership. I have been advised that it is a Hybrid Engine Coupling. There were no warning lights
2022 Jeep Wrangler · Engine · filed with NHTSA Oct 21, 2022
A complaint is one owner’s account, not a defect finding, and a bulletin is not a recall. Nothing here says this bulletin was issued because of these complaints, or that the repair it describes fixed them. Complaint files on this site begin in 2015.
More bulletins about the power train
Source: same model, same component group66 other manufacturer communications filed against the Jeep Wrangler under the same component group (power train), newest first. The eight newest are listed; the rest are on the Jeep list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| 114741 | Service bulletin | Sep 24, 2026 | TRANSMISSION KIT - WITH TORQUE CONVERTER |
| 9100904 | Service bulletin | Sep 10, 2026 | Shifter If shifter is having trouble shifting between 1st and 2nd gear, then adjust cables as described in service library. |
| 03-003-26 | Service bulletin | Jul 16, 2026 | Rear Driveshaft Out Of Balance Customers may comment on one or more of the following: SYMPTOM: ● Vehicle exhibits a vibration that increases… |
| 21-041-26 | Service bulletin | Jun 18, 2026 | Transmission Auxiliary Oil Pump Failure Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPT… |
| S2621000003 | Service bulletin | Mar 9, 2026 | The vehicle will exhibit a service transmission/check engine warning indicator for the following transmission models: 845RE, 8HP45, 850RE, 8… |
| S2603000001 | Service bulletin | Feb 25, 2026 | A suspected leak may be noticed on the front or rear axle pinion seal. |
| 9100749 Rev 1 | Service bulletin | Jan 7, 2026 | axle seal We have observed that some JL/JT rear axle shafts are leaking oil. Replace axle shaft and seal together. Do not replace seal only.… |
| S1721000016 | Service bulletin | Dec 19, 2025 | Service 4wd Light On, AWD System Service Required Message Illuminated. Diagnostic Trouble Code (DTC) C14A7-97 PTU Motor Component Or System… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Jeep, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Jeep 18-047-26 a recall?
No. A service bulletin is a manufacturer communication filed with NHTSA under 49 CFR 579.5; a safety recall carries an NHTSA campaign number (two digits, a letter, six digits) and a federal duty to repair for free. Check the vehicle’s recalls by VIN at nhtsa.gov/recalls, or on its page here.
Is the 18-047-26 repair free?
Not automatically. A service bulletin describes how to diagnose or repair a condition; who pays depends on the warranty in force, any extension, and the dealer. Quoting the number can save a diagnosis either way.
Which vehicles does 18-047-26 cover?
The manufacturer filed it against 1 model year: 2022 Jeep Wrangler. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.