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Service bulletin SGI15-23

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 id10105611
Published by NHTSA2017-06-08
Manufacturer's numberSGI15-23
Manufacturer's date2015-08-13
NHTSA componentPOWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)

NHTSA's summary

"DESCRIPTION AN ISSUE HAS BEEN IDENTIFIED ON A LIMITED NUMBER OF 2015 MODEL YEAR DISCOVERY SPORT (L550) AND 2014-2015 MODEL YEAR RANGE ROVER EVOQUE (L538) WHERE AN IRREGULAR GEAR CHANGE OCCURS OR NEUTRAL IS SELECTED. ADDITIONALLY, DIAGNOSTIC TROUBLE CODE (DTC) P1758-62 IS STORED IN THE TRANSMISSION CONTROL MODULE (TCM)."

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Transmission and driveline, Automatic transmission, Transmission control module

Trouble codes named

P1758

Vehicles listed
LAND ROVER DISCOVERY SPORT2015
LAND ROVER RANGE ROVER EVOQUE2014, 2015

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

Recalls for the same vehicles and component
16V6140002016-08-23. POWER TRAIN:AUTOMATIC TRANSMISSION

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
Q355NAS12021-12-13. Service bulletin. Technical Bulletin: Transmission Control Switch Fails to Rise
Q355UPS66132bNAS2021-12-13. Service bulletin. Technical Bulletin: Transmission Control Switch Fails to Rise
NAS20.03.0022020-04-07. Service bulletin. 9HP Transmission Extended Warranty - USA
SSM742072019-02-19. Service bulletin. A customer may express a concern that the Malfunction Indicator Lamp (MIL) is illuminated, no other symptoms are noted, for example there is no restricted performance/lack of engine power. A technician will find Diagnostic Trouble Code (DTC) P0089-64 stored in the Powertrain Control Module (PCM).
SSM739592018-11-13. Service bulletin. Issue: The customer reports reduced performance with P0191-85 observed in the PCM. This may or may not also illuminate the MIL.
SSM739472018-11-13. Service bulletin. Issue: The customer reports a MIL and P144C-00 is observed in the PCM.
SSM740932018-11-13. Service bulletin. The customer reports reduced performance with P0191-85 observed in the PCM. This may or may not also illuminate the MIL. DTCs P168F-00, P2178-00, or P144C-00 may be stored also.
SSM73959.22018-11-05. Service bulletin. Issue: The customer reports reduced performance with P0191-85 observed in the PCM. This may or may not also illuminate the MIL. DTCs P168F-00, P2178-00, or P144C-00 may be stored also.
SSM739592018-10-22. Service bulletin. Issue: The customer reports reduced performance with P0191-85 observed in the PCM. This may or may not also illuminate the MIL. DTCs P168F-00, P2178-00, or P144C-00 may be stored also.
SSM730652017-09-08. Service bulletin. Issue: Oil leakage from the joint of 9 HP transmission and front differential following a repair in and around the Transmission internal differential right output half shaft.