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.
Replace Oxygen Sensor When Servicing EGR System on Toyota Land Cruiser
Average mileage: 156,025 (102,153–250,000)
15 people reported this problem
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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.
Driving home and truck started sputtering on then turned off. Turns over but won't start
High Nox, engine light.
Check Engine Light. Both Cats and 02 Sensors needed replacing.
Diagnostic report: 02s2 malfunction. EGR system malfunction. Estimated cost $528.25 We are looking for a better price.