I have failed emissions due to 02 sensors. We have replaced them and then drove over 100 miles, but there are 4 cycles that it has not gone through. How do I get it to go through all of the cycles so that I can pass emission?

Thanks

 

Welcome to the forum...

Stop and Go traffic will help as well as drive cycles (start, drive, stop key off, repeat)
There may be a just right combination, but I don't know what it is, but I have found that city driving seems to get the monitors set most quickly...

Make sure you're not disconnecting the battery or clearing any codes during this time as that will also reset the monitors...