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Le he cambiado el catalitico hace menos de un ano y los sensores de oxigenos hace 1 semana.el codigo p0420 continua al igual el gasto execibo de gasolina el carro solo tiene 51000 millas

Vehicle: cadillac deville dts 2002

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Hi there,

This code indicates an issue with the catalyst system. Here is a list of possible causes.

P0420 CADILLAC - Catalyst System Low Efficiency Bank 1

Read more: https://www.autocodes.com/p0420_cadillac.html

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