DTC P0420 Catalyst System Low Efficiency

Document Preview

HEATED OXYGEN SENSOR 2 (HO2S 2) SERVICE GRAPHIC

Circuit Description

To control emissions of Hydrocarbons (HC), Carbon Monoxide (CO), and Oxides of Nitrogen (NOx), a three-way catalytic converter is used. The catalyst within the converter promotes a chemical reaction which oxidizes the HC and CO present in the exhaust gas, converting them in...

Attention!

To view the rest of this document requires a subscription. Subscriptions start at only $15.00. Click the button below to view the subscription options and to sign up.

Subscribe

Notice!

You may preview the service manual table of contents by clicking below.

Service Manual Table of Contents

Document Tags

Document Title: DTC P0420 Catalyst System Low Efficiency

description

control

three

catalytic

converter

used

catalyst

present

exhaust

monitor

using

hos

oxygen

sensor

signal

indicates

efficiently

operating

activity

testing

following

temperature

greater

engine

mass

flow

speed

rpm

diagnostic

test

vehicle

action

first

failed

records

warm

scan

tool

check

inspect

harness

damaged

wiring

damage

display

condition

caused

park

maintain

over

second

problem

system

counter

complete

increment

roll

part

value

powertrain

visually

physically

inspection

reveal

repair

misfiring

using scan

maintain mass

monitor test

test counter

roll over

test conditions

physically inspect

reveal problem

misfiring condition

sensor produces output

produces output signal

oxygen storage capacity

catalyst ready testing

engine speed rpm

using scan tool

display scan tool

scan tool monitor

monitor test counter

used monitor progress

part throttle maintain

powertrain board diagnostic

visually physically inspect

inspection reveal problem

problem found repair