Jeep bulletin S2108000121 REV. B
What it saysCheck Engine Light On And Service Hybrid System Displayed. NHTSA’s full summary ↓
Jeep filed this with NHTSA as a service bulletin dated Feb 12, 2026, received Jun 28, 2021, about the electrical system — 5 documents under this number: S2108000121 (4 filings) and 1 more. It names 11 model years (2021–2026). 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.
Get the next Jeep bulletin for your model by email Weekly, only when something new is filed. Nothing else; one-click unsubscribe.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationCheck Engine Light On And Service Hybrid System Displayed. P0A0A-00 High Voltage System Interlock Circuit “A” Is Active
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| S2108000121 REV. B | Service bulletin | Feb 12, 2026 | 11028892 | |
| S2108000121 | Service bulletin | May 22, 2021 | 10230055 | not found |
| S2108000121 | Service bulletin | May 22, 2021 | 10223443 | not found |
| S2108000121 | Service bulletin | May 22, 2021 | 10223283 | not found |
| S2108000121 | Service bulletin | May 22, 2021 | 10198377 | 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.
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.
Find the propulsion system for the 2026 Grand Cherokee →Affiliate disclosure: some links on this page are affiliate links. If you request a quote or buy through them we may earn a commission at no extra cost to you. Nothing on this page changes because of it.
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.
Email me new Jeep bulletins for one of these models
A weekly email, sent only in a week when Jeep files something new with NHTSA for the model you pick — service bulletins, campaigns, warranty extensions, over-the-air notices, every model year. Nothing else is sent; one-click unsubscribe in every message. Separate from recall alerts.
What owners reported
Source: NHTSA complaint databaseOwners of the 11 model years this bulletin names have filed 4,425 complaints with NHTSA since 2015. 1,984 of them name Electrical System — 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.
On the 2024 Jeep Wrangler, the 64 owners who gave an odometer reading for Electrical System reported it at a median of 15,000 miles. That figure is one model year’s, not the whole range this bulletin covers — medians from different model years are not averaged.
The contact owns a 2025 Jeep Wrangler 4XE. The contact received notification of NHTSA Campaign Number: 25V710000 (Electrical System); however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair.
2025 Jeep Wrangler · Electrical System · filed with NHTSA Jul 17, 2026 · ODI 11751198
Randomly, and without warning, the instruments, gauges, and displays will switch into a language I do not speak or understand (Italian). Coinciding with the switch to Italian language, cluster and radio display settings revert back to default settings, auto door locks and paddle shifter becomes inoperative (with no menu to enable)…
2022 Jeep Grand Cherokee · Electrical System · filed with NHTSA Aug 4, 2025 · ODI 11678139
The contact owns a 2024 Jeep Wrangler. The contact received notification of NHTSA Campaign Number: 24V652000 (Electrical System); however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair.
2024 Jeep Wrangler · Electrical System · filed with NHTSA Feb 7, 2025 · ODI 11641357
In depth: 2024 Jeep Grand Cherokee electrical problems → · 2023 Jeep Grand Cherokee electrical problems → · 2022 Jeep Grand Cherokee electrical problems → · 2024 Jeep Wrangler electrical problems →
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 group447 other manufacturer communications filed against these Jeep models 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 |
|---|---|---|---|
| 08-384-26 | Service bulletin | Oct 20, 2026 | Flash: Electronic Shift Module (ESM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must… |
| 08-382-26 | Service bulletin | Oct 20, 2026 | Flash: Electronic Shift Module (ESM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must… |
| 08-298-26 | Service bulletin | Oct 17, 2026 | Instrument Panel Cluster (IPC) Blank XZ1 Warranty Extension Customers may experience the following: SYMPTOM: ● **A blank electronic vehicle… |
| 9100935 | Service bulletin | Oct 14, 2026 | FUSE BLOCK - PWR DISTRIBUTION A/C Blowing hot air or not working. A/C relay clutch not operating, dealers are unnecessary replacing PDCs. Ba… |
| S2608000038 | Service bulletin | Oct 10, 2026 | High Voltage Battery Has Lower SOC After Overnight Sleep Cycle |
| 08-374-26 | Service bulletin | Oct 9, 2026 | R1H U43.17 Software Update - FOTA Customers may experience the following: SYMPTOM: ● CarPlay® application crash. ● Intermittent CarPlay® con… |
| 08-367-26 | Service bulletin | Oct 9, 2026 | Flash: Drivetrain Control Module (DTCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle mu… |
| 08-366-26 | Service bulletin | Oct 9, 2026 | Flash: Drivetrain Control Module (DTCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle mu… |
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 S2108000121 REV. B 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 S2108000121 REV. B 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 S2108000121 REV. B cover?
The manufacturer filed it against 11 model years: 2026 Jeep Grand Cherokee, 2025 Jeep Grand Cherokee, 2024 Jeep Grand Cherokee, 2023 Jeep Grand Cherokee, 2022 Jeep Grand Cherokee, 2026 Jeep Wrangler and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.