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1999 Toyota 4Runner Question: How do I ready the Cat. Conv. readiness monitor? I tried a drive cycle...

 

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LTL17, 3.4L V6, Port Huron, MI, January 25, 2014, 09:08
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I looked up the drive cycle to activate or "ready" the monitor. I took it out today, and it doesn't seem to work.

I changed the O2 sensor a month ago, driven it hundreds of miles, city/highway. When I plug in my scanner, all the monitors are "ready" but just not the cat...

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