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Where To Begin? Another Ck Eng Light.

dave t

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'00 ES300.

Since December I have been getting a Ck Eng light with a Trac light. The code used to show a "minor emmission control leak". This progressed to an "emission control leak". In both cases it would go two or three weeks before I had to reset it. Now it comes back on in a half hour or maybe 5 minutes. Time for me to get under the hood and check things out. I'm hoping some of you experts can save me some time by telling me the most likely culprits. I sort of assume a hose may have cracked or come off, I have the hose diagram. Is one of them more likely than the others to go bad? Any other common things to look for?

Thanks in advance,

Dave T

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