Question about 2000 Cadillac DeVille

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Po443 code - 2000 Cadillac DeVille

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Po 443 bad evap purge vavle.

Posted on Oct 27, 2009

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Code po443, evaporative emission control system,purge control valve circuit malfunction

Posted on Oct 27, 2009

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The canister EVAP purge valve is located at the (standing at the front center of the car looking at the engine) right rear of the engine top, just in front of the EGR valve which is behind the throttlebody.

Remove the vacuum lines and connectors and check the valve itself for carbon or dirt (tap it on a table top), check the vacuum lines, and clean the connector pins with Radio Shack electronic contact or tuner cleaner spray.

Hope helped.

Posted on Oct 27, 2009

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Does an 2005 Cadillac SRX AWD V6 have a purge valve and or a purge pump and where are they located

Posted on Jan 13, 2019

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2 Answers

Replaced front and fuel tank evap solenoid still getting po443 code on 2011 chevy cruze what is a solution


Try a new gas cap, that is usually the culprit. Around $20 on up for keyed at any part store. And easy to put on.

Jan 03, 2015 | 2011 Chevrolet Cruze

1 Answer

Code po443


code p0443 refers to EVAP canister purge valve--circuit malfunction===causes --wiring---EVAP canister purge valve--ECM

code p0451 refers to EVAP pressure sensor --range/performance problem===causes --EVAP pressure sensor

code p0135 refers to heated oxygen sensor(HO2S) 1 bank 1 heater control --circuit malfunction===causes --fuse--wiring--HO2S ---ecm

basically the HO2S sensor is not stable and altering the air/fuel mixture settings for the ECM and this is not being helped by a faulty EVAP purge valve and pressure sensor.

Aug 24, 2014 | Ford F-150 Cars & Trucks

1 Answer

Does the purge valve keep the engine from starting?


You got the code

You can google the code to learn about it

Type: OBD PO443

The internet will explain the valves function & location,etc

The fact you have a code don't mean the part is bad

It may well be,but the evap system has to be tested & the
valve component tested & fail to need replacement

Nothing to do with starting

It opens to pull fuel tank fumes into the engine & burn them
based on computer strategy

If it is stuck open then you get unmetered air into the motor &
it can effect your fuel trim & cylinder firing

May 14, 2014 | 2004 Buick Rendezvous

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Wwhat does code po443 mean on nissan maxima 1996


2008 Nissan frontier code po443 what doesit m aen on tell how to fix it how dow I find on the truck thanks

Mar 23, 2013 | 1998 Nissan Maxima

1 Answer

Po443 code 2002 ford taurus


That code is for the Evaporative Emissions. It could be a bad Evaporative Emissions Canister Valve or just a bad vacuum line or my granddaughter's 1997 Ford Escort had that code and her gas cap was NOT on. Now when you figure out what one it is disconnect the battery for 10 minutes to reset the computer.

Jan 16, 2010 | 2002 Ford Taurus

1 Answer

2000 lesabre code po443


Evaporative emission control system purge control valve circuit. po443

Jul 07, 2009 | 2000 Buick LeSabre

1 Answer

I am getting codes PO440 PO443 PO 449 on my 2000 Silverado and the SES light is on


PO440 Possible Causes:
Charcoal canister is loaded with fuel or moisture
Fuel filler cap is loose, cross-threaded, damaged or wrong part
Fuel tank, fuel filler neck or fuel sending unit 'O' ring is leaking
Fuel tank pressure sensor is damaged, disconnected or it failed
Fuel tank vapor line(s) is clogged, damaged or disconnected
Purge valve vapor line is clogged, damaged, or disconnected
Purge or vent solenoid power circuit is open (check the fuse)
PCM has failed

PO443:
Purge solenoid control circuit is open or shorted to ground
Purge solenoid control circuit is shorted to system power (B+)
Purge solenoid power circuit is open (test the ENG1 fuse)
Purge solenoid is damaged or has failed
PCM has failed

PO449:
Sames as PO443.

Hope this helps.

Mar 06, 2009 | 2000 Chevrolet Silverado 1500

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