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 4Runner
Average mileage: (–)
9 people reported this problem
0 people shared problem details
Check engine light was on so I had it hooked to an engine code analyzer and it indicated the throttle position sensor was the problem. Replaced the sensor with no improvement? Any suggestions?
Failed CA smog test, NO(PPM) levels were at 512 (MAX) 88 (AVE) and 747 (MEAS) which is what cau...
where is the oxygen sensor located and how hard is it to replace?
Replaced oxygen sensor (bank one) but mechanic indicated there were multiple codes. Said there...
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/...