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Service bulletin UPS1520-1bNAS1

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 id10173516
Published by NHTSA2020-04-07
Manufacturer's numberUPS1520-1bNAS1
Manufacturer's date2020-03-09
NHTSA componentPOWER TRAIN:AUTOMATIC TRANSMISSION

NHTSA's summary

A potential issue has been identified on certain vehicles within the listed Affected Vehicle Range which may experience restricted performance and a 'Gearbox Fault Detected' warning message displayed on the Instrument Panel Cluster (IPC).

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, Automatic transmission

Vehicles listed
LAND ROVER DISCOVERY2020
LAND ROVER RANGE ROVER EVOQUE2020

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

Other bulletins for the same vehicles and component
N8812024-04-05. Service bulletin. On certain 2017 model year to 2020 model year Land Rover and Range Rover vehicles the Malfunction Indicator Lamp (MIL) may illuminate if the vehicle is refueled within 15 seconds of turning the engine off. Diagnostic Trouble Codes (DTC) P0496-00 may be stored in the Powertrain Control Module (PCM) .
N747v32024-04-05. Service bulletin. CLOSED ISSUE - On certain 2017 to 2020 model year Land Rover vehicles the Malfunction Indicator Lamp (MIL) may illuminate if the vehicle is refueled within 15 seconds of turning the engine off. Diagnostic Trouble Codes (DTC) P0496-00 may be stored in the Powertrain Control Module (PCM).
SFCC_MAR2024_612024-04-05. Service bulletin. Lack of power, MIL light on, rough idle
SFCC_NOV2022_292022-12-07. Service bulletin. Customer reports coolant level low message on dash or a coolant leak.
SSM757012022-04-07. Service bulletin. 8HP 8-Speed Automatic Transmission replacements due to Automatic Transmission Fluid (ATF) contamination with coolant.
SFCC_MAR2021_312021-04-07. Service bulletin. Lost Communication With Battery Energy Control Module "A"
SFCC Jul20_182020-08-07. Service bulletin. The Check Engine MIL is on. There is a lack of power from the engine.
N451NAS12020-07-08. Service bulletin. A potential issue has been identified on certain Land Rover vehicles within the listed Affected Vehicle Range which may experience excessive engine cooling fan noise in the passenger compartment and eventual degradation of the engine cooling system performance.
NAS20.03.0042020-04-07. Service bulletin. An issue has been identified on a limited number of Land Rover vehicles within the listed Affected Vehicle Range which may experience restricted performance and a 'Gearbox Fault Detected' warning message displayed on the Instrument Panel Cluster (IPC).