Emissions Monitors - 2 won't reset. :( - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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Emissions Monitors - 2 won't reset. :(

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06-01-2020, 08:46 AM

JFP in PA

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Join Date: Feb 2005

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Quote:

Originally Posted by TRP

Model Year: 2000
Mileage: 40,800
Codes: None (I've checked with my FOXWELL ODBII Reader)
Disconnected battery to install stereo

I don't know if the OBD II unit you have is capable of it, but I would warm the car up and check the voltages of the sensors on opposite sides of the three way converter, what you are looking for is one voltage remaining constant while the other cycles in a sine wave fashion; if they are both moving the same, your cats are on their way out.

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