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Toyota Repair/catalyst not ready


Hi experts

I was getting a check engine light when driving in hot weather for more than 2 hours continuous on the highways going downhill. I don't get a CEL when driving within city ever. Every time I got a CEL i reset it as per my mechanic says. now i failed emission because Catalyst was not in ready state. I research and look for drive cycles and did few cycles but CAT is still not ready. My question is should I keep trying those cycles or go to dealer and ask a quote which I know will be expensive?

Any help will be appreciated..

Hello, the cat converter will not go into ready mode because it is failing, the reason it turns the CEL on is that when it gets hot it stops functioning correctly then the light goes of after it cools sown, most independent muffler shops can weld a new cat in for you a lot cheaper than the dealer OEM parts.

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Ted Ritter


I have more than 28 years experience as toyota technician, I will be able to answer most questions related to the Toyota product line up to the present year models,I am located in the US but welcome questions from other regions of the world. When asking a question please provide specific information: year,model, engine,transmission information. Provide as much information as possible including a brief repair history if possible. I have been a volunteer here for more ten years an have answered over 16,000 questions helping Toyota owners with their problems and save thousands of dollars without any compensation, some of my answers are published on many other websites including google and various automotive forums. DONATIONS ARE VERY MUCH APPRECIATED, IF YOU HAVE RECIEVED HELPFUL INFORMATION PLEASE MAKE A DONATION. AS OF TODAY (JULY 22, 2014) ALL REQUESTED GRAPHICS, ILLUSTRATIONS, DIAGRAMS, PHOTOS, WILL REQUIRE THE MINUMUM DONATION UP FRONT.


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