Jeep bulletin 18-052-26 REV. A
What it saysFlash: Powertrain Control Module (PCM) Updates - PCR8A3 Technicians may find one or more of the following Diagnostic Trouble Code (DTC): SYMPTOM: **P22D3-00 - Turbo Turbine Inlet Valve Stuck Closed. NHTSA’s full summary ↓
Jeep filed this with NHTSA as a service bulletin dated Jun 16, 2026, received May 20, 2026, about the electrical system — 2 documents under this number: 18-052-26 and 1 more. It names 1 model year (2026). 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 communicationWhat it applies to, as the document itself states it — the build window in the manufacturer’s own words, read by machine from the PDF NHTSA serves. The build date is on the certification label in the driver’s door jamb; the dealer settles a borderline vehicle by its VIN.
Flash: Powertrain Control Module (PCM) Updates - PCR8A3 Technicians may find one or more of the following Diagnostic Trouble Code (DTC): SYMPTOM: ● **P22D3-00 - Turbo Turbine Inlet Valve Stuck Closed. DTC falsely sets. ● P016A-00 - Excessive Time To Enter Closed Loop Air/fuel Ratio Control. DTC falsely sets.** ● P04B6-00 - Fuel Fill Door Stuck Closed (Stored Status). NOTE: There will be no Malfunction Indicator Lamp (MIL) for this DTC. Customers may also experience one or more of the following: ● The vehicle will not start and cannot be keyed off. NOTE: The vehicles 12V system remains powered up. ● Poor combustion stability or "wavy" engine RPM oscillations during engine warm-ups. ● Engine Stop/Start (ESS) bumps or lack of refinement. ● Noisy/poor starts in extreme cold temperatures. ● Perceived after-run pump noise after vehicle is turned off. The following software enhancements are also available: ● **Disablement for DTCs P22D3-00 and P016A-00 setting.** ● Diagnostic improvements for DTCs, P013A-00, P013B-00, P013E-00 and P013F-00. ● Improved transitions between engine operating modes for emissions robustness. ● Scan tool improvement to show accurate state of after-run pump. ● Scan tool improvements for EVAP system data. ● Improved combustion stability during warm-up and catalyst-reheating mode. ● Improved ESS refinements. ● Optimization of after-run pump usage for lower 12V usage and perceived customer noise. ● Disablement of DTC P04B6-00 for falsely setting. ● Calibration update for EVAP system Service Leak Test. ● Improved engine starts at extreme low temperatures. This bulletin involves inspecting and possibly reprogramming the Battery Pack Control Module (BPCM), Drive Motor Power Inverter (DMPI), Electric Vehicle Control Unit (EVCU) and PCM with the latest available software.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 18-052-26 REV. A | Service bulletin | Jun 16, 2026 | 11034322 | |
| 18-052-26 | Service bulletin | May 12, 2026 | 11032840 |
What the document itself lists
Labour operation and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| 18-19-17-CQ | Inspect EVCU, PCM, DMPI, and BPCM Module Software Level | 0.2 hrs |
Read by machine from the document NHTSA serves (4 pages), read Sep 29, 2026. A part number is shown only where it matches Jeep’s own catalogue shape, an operation only with its code and time, and a description only where the reader got it whole; anything it could not settle is left out, and the PDF is the record. Times are the manufacturer’s warranty allowances, not a quote. Listings and prices on eBay Motors are the seller’s.
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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.
Doing the repair yourself, or pricing it before the shop does? Search the part by fitment on eBay Motors — the listing and the price are the seller’s.
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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 9 complaints with NHTSA since 2015. 5 of them name Power Train, Electrical System, Structure — 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.
I was driving the vehicle in heavy traffic, at the speed of 1-3 mph, then stopped at a stoplight, when the hood latch spontaneously disengaged, allowing the hood to pop open. There was seemingly no reason this should have happened.
2026 Jeep Cherokee · Structure · filed with NHTSA Oct 9, 2026 · ODI 11770038
On October 1, 2026, at approximately 1,968 miles, my 2026 Jeep Cherokee experienced a serious powertrain failure. I began driving home from work and the vehicle initially moved without severe shaking.
2026 Jeep Cherokee · Power Train · filed with NHTSA Oct 7, 2026 · ODI 11769616
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 electrical system
Source: same model, same component group64 other manufacturer communications filed against the Jeep Cherokee under the same component group (electrical system), newest first. The eight newest are listed; the rest are on the Jeep list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| S2508000037 REV. A | Service bulletin | Oct 22, 2026 | No Start, Passive Entry Inoperative |
| S2608000037 | Service bulletin | Oct 10, 2026 | Negative Response 0X33 - Security Access Denied When Flashing BPCM With WiTech |
| S2623000056 | Service bulletin | Oct 2, 2026 | The Door Latch Module Has Active Faults With No Warning Indicators In Cluster |
| 9100926 | Service bulletin | Sep 30, 2026 | WIRELESS CHARGER Welcome GREEN LED not turning ON after multiple IGN ON/OFF without sleep cycle and no phone on the charging pads. Part numb… |
| 08-332-26 REV. B | Service bulletin | Sep 16, 2026 | Hybrid Cooling Pump Emergency Mode Condition Customers may comment on one or more of the following: SYMPTOM: ● 12V battery is draining. NOTE… |
| 08-178-26 REV. A | Service bulletin | Sep 11, 2026 | Flash: Power Liftgate Module (PLGM) Update Customers may comment on one or more of the following: ● The power liftgate chime remains active… |
| 08-326-26 | Service bulletin | Aug 28, 2026 | Malfunction Indicator Illuminated (MIL) - P04DF-00 Has Set Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the… |
| 9100880 | Service bulletin | Aug 7, 2026 | Cluster Assembly When the technician connects to the vehicle via Witech, they observe Stored and/or Pending DTC in the IPC for KM49, LB, KM7… |
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 18-052-26 REV. A 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 18-052-26 REV. A 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. Every Stellantis warranty extension on file lists the ones Stellantis has filed.
Which vehicles does 18-052-26 REV. A cover?
The manufacturer filed it against 1 model year: 2026 Jeep Cherokee. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone. The document itself sets the build window: built 15 Dec 2025 – 24 Apr 2026 — the build date is on the certification label in the driver’s door jamb.