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P0420 Diagnostic Trouble Code Discussion for November 2006

Catalyst Efficiency Below Normal (Bank 1)

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Trouble Ticket Help Requests for DTC P0420
Help Request Posted
2001 Nissan Maxima SE 3.0L MIL Lamp on VIN: D71T838056
P0420: Catalyst Efficiency Below Normal (Bank 1). customer complaint of mil, no drivibilty problem,, does this car need a cat. or a maf
November 12, 2006