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'00 B5 S4 with P0421

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Old Apr 16, 2011 | 02:08 PM
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the24thletter's Avatar
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Default '00 B5 S4 with P0421

Most of the info I've found on this code suggests replacing the rear 02 sensor, which I plan to do. But does anyone know if this can cause the car not to start intermittently for at least 10 to 15 minutes...then suddenly start as if nothing i wrong?
 
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