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That's right about time for one of the cats to go, probably a "catalytic converter under efficiency" light. At any rate, if its not flashing its a tertiary emissions component and still needs to be dealt with.
Often if one component goes out, the computer puts that device or subsystem into a loop mode and you loose fuel efficiency. And don't pull the light whatever you do, that puts the system into limp mode.
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2021 Model Y
2005 Cayenne Turbo
2012 Panamera 4S
1980 911 SC
1999 996 Cab
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