DTC P0420

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Circuit Description

Schematic

The catalyst monitor test is performed once per drive cycle if all test conditions are met. The main enable criteria to enable a catalyst test are: a steady TP sensor reading and calculated temperature of catalytic converter, using the ECT sensor, IAT sensor, load, and run...

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Service Manual Table of Contents

Document Tags

Document Title: DTC P0420

catalyst

monitor

test

conditions

enable

sensor

converter

results

efficiency

stage

dtcp

rear

misfire

monitor test performed

lamp illuminated dtcp