Jeep bulletin 08-174-26
What it saysFlash: Central ADAS Decision Module (CADM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set at least one of the following Diagnostic Trouble Codes… NHTSA’s full summary ↓
Jeep filed this with NHTSA as a service bulletin dated Apr 23, 2026, received Apr 29, 2026, about the electrical system. It names 2 model years (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 communicationFlash: Central ADAS Decision Module (CADM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set at least one of the following Diagnostic Trouble Codes (DTCs): ● C2203-00 - Current VIN Missing/Mismatch. ● C008E-00 - ECU Internal Performance. (With Environmental Data Decode Byte: APP_FATAL_ERROR_APP_CONFIGURATION_ERROR_FAULT.) Customers may also comment on one or more of the following: ● The Instrument Panel Cluster (IPC) is displaying one or more of the following messages: ○ "ACC/FCW Unavailable Service Required". ○ "ACC/FCW Limited Functionality". ○ "Active Lane Management Limited Functionality." ○ "Active Lane Management Unavailable Service Required". ○ "Automatic Emergency Braking (AEB) Limited Service Required". ○ "AEB Unavailable Service Required". ○ "Blindspot Detection Unavailable Service Required" ○ "Blindspot Detection Limited Functionality" ● Customer states that the ADAS features are disabled This bulletin involves **inspecting and possibly reprogramming** the CADM with the latest available software and possibly performing a Long Range Camera Front (LRCF) calibration
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 08-174-26 | Service bulletin | Apr 23, 2026 | 11031668 | 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 2 model years this bulletin names have filed 5 complaints with NHTSA since 2015. 2 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.
The contact owns a 2026 Jeep Grand Wagoneer. The contact stated that while driving 45 MPH, the vehicle unexpectedly stopped while driving in traffic. The contact stated that there was an audible beeping sound after the brake failure. The contact stated that the vehicle experienced several electrical failures.
2026 Jeep Grand Wagoneer · Electrical System · filed with NHTSA Oct 5, 2026 · ODI 11769151
On XXX, a 2026 Jeep Grand Wagoneer towing a camper/trailer experienced a safety interlock failure resulting in an unintended vehicle rollaway and severe personal injuries.
2026 Jeep Grand Wagoneer · Electrical System · filed with NHTSA Sep 28, 2026 · ODI 11767391
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 group280 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 |
|---|---|---|---|
| 08-405-26 | Service bulletin | Oct 24, 2026 | Flash: Body Control Module (BCM) Update Customers may comment on the following: SYMPTOM: ● Driver and passenger doors do not lock or unlock… |
| 08-404-26 | Service bulletin | Oct 24, 2026 | Flash: Radio Frequency Hub Module (RFHM) Update Customers may comment on the following: SYMPTOM: ● Driver and passenger doors do not lock or… |
| 08-403-26 | Service bulletin | Oct 24, 2026 | Flash: Body Control Module (BCM) Update Customers may comment on the following: SYMPTOM: ● Driver and passenger doors do not lock or unlock… |
| 08-402-26 | Service bulletin | Oct 24, 2026 | Flash: Radio Frequency Hub Module (RFHM) Update Customers may comment on the following: SYMPTOM: ● Driver and passenger doors do not lock or… |
| S2508000037 REV. A | Service bulletin | Oct 22, 2026 | No Start, Passive Entry Inoperative |
| 9100944 | Service bulletin | Oct 15, 2026 | FUSE BLOCK RR - PWR DISTRIBUTI A/C Blowing hot air or not working. A/C relay clutch not operating, dealers are unnecessary replacing PDCs. B… |
| 9100943 | Service bulletin | Oct 15, 2026 | FUSE BLOCK UNDERHOOD - PWR DIS A/C Blowing hot air or not working. A/C relay clutch not operating, dealers are unnecessary replacing PDCs. B… |
| 08-375-26 | Service bulletin | Oct 14, 2026 | Tow Nav Menu Option Unavailable - UBQ/UBW Customers may comment on the following: SYMPTOM: ● Tow Nav menu option is grayed out and cannot be… |
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 08-174-26 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 08-174-26 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. Every Stellantis warranty extension on file lists the ones Stellantis has filed.
Which vehicles does 08-174-26 cover?
The manufacturer filed it against 2 model years: 2026 Jeep Grand Wagoneer, 2026 Jeep Wagoneer. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.