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Service bulletin D154 UPS3926-2 - 16SEP26

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id11038286
Published by NHTSA2026-10-07
Manufacturer's numberD154 UPS3926-2 - 16SEP26
Manufacturer's date2026-09-16
NHTSA componentPOWER TRAIN

NHTSA's summary

The 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.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Transmission and driveline

Vehicles listed
LAND ROVER RANGE ROVER2026
LAND ROVER RANGE ROVER SPORT2027

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
26V6070002026-09-23. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
SSM76508 - 11SEP262026-10-07. Other. Diagnostic Trouble Code stored in the Powertrain Control Module(PCM). The DTC may be unable to be cleared and may return to a confirmed status after three drive cycles.
SSM76507 - 16SEP262026-10-07. Other. Malfunction Indicator Lamp (MIL) illuminated.
SSM76497 - 21AUG262026-09-08. Other. Engine MIL Illuminated With Crankshaft Position Correlation DTCs Stored
SSM76457 - 21MAY262026-06-03. Other. Amber MIL being displayed on the Instrument Panel Cluster on vehicles equipped with a Gen4 transmission.
SSM76454 - 12MAY262026-06-03. Other. Malfunction Indicator Lamp (MIL) is illuminated on the instrument panel.
TUCC_APR2026_312026-05-08. Other. COMBUSTION INSTABILITY
SSM000030 - 26MAR262026-04-06. Other. Malfunction Indicator Lamp (MIL) is illuminated on the instrument panel.