Toyota Land Cruiser
Report: Replace Oxygen Sensor When Servicing EGR System
Toyota Land Cruiser Problem
Over the time the exhaust gas recirculation (EGR) system may become plugged with debris, the oxygen sensor may also be getting slow or 'lazy' around this time. When servicing or cleaning the EGR system, it is a good idea to replace the oxygen sensor because it works in tandem with the EGR system.
Visitor, 1997 Toyota Land Cruiser, 127,000 mi
had to replace both oxygen sensors after check engine light was tripped. bought replacements on Amazon for 1/2 the price of lcoal store and replaced them myself in about an hour.