DTC P1442 EVAP Vacuum Switch Circuit

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Evap Control System

Circuit Description

The EVAP purge vacuum switch is a normally closed switch positioned in the purge line between the canister and the EVAP purge solenoid. The EVAP purge vacuum switch will open when vacuum increases to greater than 5 inches of water in the purge line. The PCM monitors the E...

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Document Tags

Document Title: DTC P1442 EVAP Vacuum Switch Circuit

circuit

evap

purge

vacuum

switch

line

canister

solenoid

open

signal

evaporative

emission

control

system

present

sensor

engine

action

consecutive

diagnostic

test

failed

records

scan

tool

check

poor

connection

harness

terminals

damaged

observe

display

hose

routing

fuel

condition

faulty

vehicle

running

powertrain

replacement

ignition

electrical

problem

found

repair

replace

switch open

switch signal

signal circuit

evap vacuum

observe evap

display scan

canister purge

engine running

display purge

vacuum switch open

vacuum switch signal

switch signal circuit

evap vacuum switch

using scan tool

check following conditions

observe evap vacuum

display scan tool

powertrain control module

control module replacement

module replacement programming

powertrain board diagnostic

ignition engine running

engine running observe

running observe evap

scan tool evap

tool evap vacuum

repair procedures electrical

diagnosis problem found

refer emission hose

emission hose routing

hose routing diagram

found repair problem

repair problem found