Stellantis bulletin 08-143-26
What it saysTraffic Sign Assist Unavailable – Service Required The customer may experience one or more of the following: SYMPTOM: “Traffic Sign Assist Unavailable – Service Required” message and icon displays on the Instrument… NHTSA’s full summary ↓
Stellantis filed this with NHTSA as a service bulletin dated Apr 3, 2026, received Apr 10, 2026, about the electrical system. It names 29 model years across Jeep, Ram and Dodge (2024–2026). 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.
One page for every brand it was filed under. Each brand’s bulletins: Jeep · Ram · Dodge.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationTraffic Sign Assist Unavailable – Service Required The customer may experience one or more of the following: SYMPTOM: ● “Traffic Sign Assist Unavailable – Service Required” message and icon displays on the Instrument Panel Cluster (IPC). This occurs after a remote start and typically at the first start of the day. ● The Odometer flashes when the traffic alert message is active. . No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, or otherwise, without written permission of FCA US LLC.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 08-143-26 | Service bulletin | Apr 3, 2026 | 11031224 | 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 themJeep 11 model years
Ram 15 model years
Also filed against model years this site has no page for: 2024 Ram 4500; 2025 Ram 4500; 2026 Ram 4500; 2024 Ram 5500; 2025 Ram 5500; 2026 Ram 5500.
Dodge 3 model years
A 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 23 model years this bulletin names have filed 1,511 complaints with NHTSA since 2015. 726 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 2025 Ram 1500, the 24 owners who gave an odometer reading for Electrical System reported it at a median of 6,000 miles. That figure is one model year’s, not the whole range this bulletin covers — medians from different model years are not averaged.
Car engine completely shuts down at highway speeds sudden loss of throttle/power at highway speed * RPM surging or erratic behavior * dashboard/light flickering * vehicle entering limp mode or shutting down * no-start condition afterward * then the vehicle “magically” works again later * dealership unable to reproduce it * sometimes no…
2024 Jeep Grand Wagoneer · Electrical System · filed with NHTSA May 27, 2026
I am filing a safety defect complaint regarding a 2026 Dodge Charger Daytona (400V electric vehicle platform) that suffered a catastrophic high-voltage system shutdown at approximately 1,261 miles. The vehicle had charge remaining and was being prepared for charging when it experienced a forced EV system shutdown and would not restart.
2026 Dodge Charger · Electrical System · filed with NHTSA Feb 24, 2026
For the past year I have been dealing with multiple vehicle failures with our 2025 Jeep Wagoneer. I have worked with my dealer a dozen times. Adnt he vehicle has been under service for roughly 13 weeks. Each time the dealership tells me the issue was a software update or they were not able to "recreate the issue".
2025 Jeep Wagoneer · Electrical System · filed with NHTSA Jul 10, 2026
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 group987 other manufacturer communications filed against these Stellantis 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 |
|---|---|---|---|
| 08-339-26 | Service bulletin | Sep 24, 2026 | Max Tow Right and Left Rear Wheel Speed Sensors Inoperable Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the… |
| 08-341-26 | Service bulletin | Sep 24, 2026 | Heads Up Display (HUD) Dimming Too Low Customers may experience one or more of the following: SYMPTOM: ● HUD is very dark and hardly viewabl… |
| 08-221-26 | Service bulletin | Sep 23, 2026 | R1H Radio U41.10 USB Software Update Customers may experience one or more of the following: ● FCW OFF light ON with no DTCs and can't turn o… |
| 9100923 | Service bulletin | Sep 21, 2026 | AIR CLEANER - NONE Instruction to Dealers while ordering the PN# 68137142AD. 1. If the Air Cleaner Assembly is functional and only the MAF S… |
| 08-069-26 REV. A | Service bulletin | Sep 18, 2026 | Flash: Power Liftgate Module (PLGM) Updates Customers may experience one or more of the following symptoms: SYMPTOM: ● **Continuous chime is… |
| 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… |
| 08-331-26 | Service bulletin | Sep 11, 2026 | Flash: Vehicle System Interface Module (VSIM) Updates Customers may experience a Malfunction Indicator Lamp (MIL) illumination and the vehic… |
| 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… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Jeep, Ram and Dodge, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Stellantis 08-143-26 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 08-143-26 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 08-143-26 cover?
The manufacturer filed it against 29 model years across 3 brands (Jeep, Ram and Dodge): 2026 Dodge Charger, 2025 Dodge Charger, 2024 Dodge Charger, 2026 Jeep Cherokee, 2026 Jeep Grand Cherokee, 2025 Jeep Grand Cherokee and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.