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Service bulletin SSM73866

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 id10145624
Published by NHTSA2018-10-15
Manufacturer's numberSSM73866
Manufacturer's date2018-06-26
NHTSA componentENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR

NHTSA's summary

Issue: A Technician will find the following Diagnostic Trouble Code (DTC) relevant to catalyst system efficiency, P0420-00 stored in the Powertrain Control Module (PCM). The Malfunction Indicator Lamp (MIL) could also be illuminated. Affected vehicle vin ranges as follows ? Range Rover Sport (LW) AJ200P PHEV ? 146054 onwards. Range Rover (LG) AJ200P PHEV ? 343646 onwards

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

Engine, Exhaust and emissions, Catalytic converter

Trouble codes named

P0420

Vehicles listed
LAND ROVER RANGE ROVER2018
LAND ROVER RANGE ROVER SPORT2018

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
SSM738662018-10-15. Service bulletin. Issue: A Technician will find the following Diagnostic Trouble Code (DTC) relevant to catalyst system efficiency, P0420-00 stored in the Powertrain Control Module (PCM). The Malfunction Indicator Lamp (MIL) could also be illuminated.
SSM738662018-09-17. Service bulletin. Issue: A Technician will find the following Diagnostic Trouble Code (DTC) relevant to catalyst system efficiency, P0420-00 stored in the Powertrain Control Module (PCM). The Malfunction Indicator Lamp (MIL) could also be illuminated.