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International Automotive Technicians Network
Re: When to check for proper light off temp of catalytic convert
Posted to Emissions Forum on 7/22/2011

Hi Lorin,

The $23 or $45 test fee will give you a ton of diagnostic info and get you way closer to determining the cause of failure than this temp test ever will.

I am afraid this testing method was never accurate and a total waste of time.

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