Land Rover bulletin D154 UPS3926-2 - 16SEP26
What it saysThe Powertrain Control Module (PCM) software has a concern that can lead to PCM reset when the engine is in catalyst heating or catalyst warming. NHTSA’s full summary ↓
Land Rover filed this with NHTSA as a service bulletin dated Sep 16, 2026, received Oct 7, 2026, about the power train. It names 2 model years (2026–2027). 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 communicationThe Powertrain Control Module (PCM) software has a concern that can lead to PCM reset when the engine is in catalyst heating or catalyst warming. This is accompanied by a Malfunction Indicator Lamp (MIL) on the instrument panel cluster.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| D154 UPS3926-2 - 16SEP26 | Service bulletin | Sep 16, 2026 | 11038286 | PDF, 75 KB |
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 2 complaints with NHTSA since 2015.
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 group136 other manufacturer communications filed against the Land Rover Range Rover under the same component group (power train), newest first. The eight newest are listed; the rest are on the Land Rover list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| SSM76508 - 11SEP26 | Other | Oct 7, 2026 | Diagnostic Trouble Code stored in the Powertrain Control Module(PCM). The DTC may be unable to be cleared and may return to a confirmed stat… |
| N881 Range Rover 18SEP26 | Other | Sep 18, 2026 | Malfunction Indicator Lamp (MIL) may illuminate if the vehicle is refueled within 15 seconds of turning the engine off. |
| N861 Range Rover 18SEP26 | Other | Sep 18, 2026 | Malfunction Indicator Lamp (MIL), loss of start/stop functionality and no communication during diagnostic sessions. |
| D074 Range Rover 18SEP26 | Other | Sep 18, 2026 | The incorrect CCF will cause a Malfunction Indicator Lamp (MIL) warning that is not required / relevant for MHEV vehicles. |
| SSM76507 - 16SEP26 | Other | Sep 16, 2026 | Malfunction Indicator Lamp (MIL) illuminated. |
| SSM76497 - 21AUG26 | Other | Sep 8, 2026 | Engine MIL Illuminated With Crankshaft Position Correlation DTCs Stored |
| N900 Range Rover 21AUG26 | Other | Aug 21, 2026 | Malfunction Indicator Lamp (MIL) illuminated on the instrument cluster. The root cause of the symptoms is the catalytic converter over tempe… |
| N881 Range Rover 21AUG26 | Other | Aug 21, 2026 | Malfunction Indicator Lamp (MIL) may illuminate if the vehicle is refueled within 15 seconds of turning the engine off. |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Land Rover, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Land Rover D154 UPS3926-2 - 16SEP26 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 D154 UPS3926-2 - 16SEP26 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 D154 UPS3926-2 - 16SEP26 cover?
The manufacturer filed it against 2 model years: 2027 Land Rover Range Rover, 2026 Land Rover Range Rover. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.