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I went to get my emissions done and I threw a code PO446 for an evap Canister Malfunction. Money is a little too tight to take it to Pep Boys so I want to change it out myself but I don't know how to. Help please?

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Problem is that the code does NOT mean that any one part needs to be replaced

as a matter of fact, emission diagnoses is one of the toughest in any garage

unless you are an experienced technician I would not recommend any work on this vehicle because you are more likely to spend more money "guessing" at whats wrong as compared to letting someone "good" diagnose the concern

most of the time I find the concern to be a hole in the evap line and this is after many guys have tried many repair attempts to no avail


Posted on May 15, 2010

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3 Answers

Code po446 what is it


Its what is called the EVAP. system the code is for the vent solenoid .Gas vapor in a vacuum is drawn from the fuel tank when this vent is commanded to be open drawn into a canister filled charcoal and stored until the canister purge solenoid is commanded to open .
This happens when the engine speed is at a higher RPM level and is supposed to send the vapor to the engine to be burned instead of VOC'S going into the atmosphere .But its a crazy lie the last time I filled up more VOCS got into the atmosphere then a gas tank vent could do in 6 month or so .
You can try cleaning the filter in the vent solenoid it might work but the part is about 70 dollars its in the rear between the tank and the canister look for hoses .

Jun 18, 2016 | 2006 Chevrolet Impala

1 Answer

Buick rendezvous 2002 from wheels, have 2 codes PO446 PO453


code p 0446 refers to evaporative emission (EVAP) system---vent control---circuit malfunction===causes --wiring---EVAP canister purge valve ---ECM
replace the purge valve
code p 0453 refers to EVAP pressure sensor --high input ===causes --wiring short to positive --EVAP pressure sensor ---ECM
replace the sensor

Nov 02, 2015 | 2005 Buick Rendezvous

1 Answer

What will fix codes po320 & po446?


EOBD code Fault location Probable cause
P0320 Crankshaft position WiringCKP/RPM ,
(CKP) sensor/engine sensorECM
speed (RPM) sensor
circuit malfunction
,
EOBD code Fault location Probable cause P0446 Evaporative emission (EVAP) system, vent control - circuit malfunction Wiring, EVAP canister purge valve, ECM Hope that helps

Oct 19, 2014 | 2007 Ford Explorer Sport Trac

1 Answer

Hello there,my 2001 echo is lighting up trouble codes p0440 p0441 p0446; how and where should i start?


code p0440 refers to evaporative emission (EVAP) system--malfunction=== causes --hose connections --intake leak--EVAP canister purge valve
code po441 refers to EVAP --incorrect flow detected==causes the same as for po440
code po446 refers to EVAP system vent control --circuit malfunction===causes --wiring---EVAP can purge valve--ECM
generally I would replace the purge valve as it is common to all codes

Feb 03, 2014 | Cars & Trucks

1 Answer

Po156 po161 po446


code p0156 refers to heated oxygen sensor 2 bank2 circuit malfunction===causes--heating inoperative--wiring---HO2S--EcM
code p0161 refers to HO2S 3 -circuit malfunction==causes the same as p0156
p04456 refers to evaporative emission (EVAP) system-vent control-circuit malfunction====causes--wiring--EVAP canister purge valve--ECM

Oct 13, 2013 | 2005 Kia Spectra

1 Answer

P0446 on 1997 ford expedition what is the most common culprit and where is it?


code po446 refers to evaporative emission system (EVAP) vent control--circuit malfunction==causes Wiring--EVAP canister purge valve --ECM. The purge valve is not working and causing your problem. Replace it.

Aug 23, 2013 | Cars & Trucks

1 Answer

Toyota echo won't start code 440 441 446


Error Code: P0440
Fault Location:
Evaporative Emission (EVAP) System - Malfunction
Possible Cause:
Malfunction Indicator Lamp (MIL) active.
Soution:
Check Evaporative Emission (EVAP) System Sealing.
Check Evaporative Emission (EVAP) Canister Purge Regulator Valve .
Check Evaporative Emission (EVAP) Canister Purge Solenoid Valve .

Error Code: P0441
Fault Location:
Evaporative Emission (EVAP) System - Incorrect Flow Detected
Possible Solutions:
Check Evaporative Emission (EVAP) Canister Purge Regulator Valve .
Perform Output Test.
Check Evaporative Emission (EVAP) Canister Purge Solenoid Valve .
Check Evaporative Emission (EVAP) Canister.
Perform Basic Setting.
Check Pipes between Tank Breathing and Throttle Body.

Error Code: P0446
Fault Location:
Evaporative Emission (EVAP) System, Vent Control - Circuit Malfunction
Possible Cause:
Wiring harness.
Evaporative emission (EVAP) canister purge valve.
Engine control module (ECM).

Feb 25, 2013 | 2002 Toyota ECHO

1 Answer

Went to auto zone got my code- pd 446 evaperation emission control malfunction


PO446 is evap system pressure is to high in tank the cause is the purge control solenoid located with charcoal canister is not working

replace purge control solenoid clear code


plz vote comment reply if you need more info

Jan 18, 2011 | 2003 Chevrolet Venture Passanger

1 Answer

I went to get my emissions done and I threw a code PO446 for an EVAP Canister Malfunction. Money is a little too tight to take it to Pep Boys so I want to change it out myself but I don't know how to. Help...


that dont mean it needs a new canister it a evap vent conrol circuit problem. that means somethings up with the purge valve or a vent valve[dont know what your car is] dont waiste money on a canister.spend it diagnosing the problem then fix it yourself

Mar 23, 2010 | Oldsmobile Alero Cars & Trucks

2 Answers

P0441 EVAP Control System Incorrect Purge Flow


Error Code: P0441
Fault Location:
Evaporative Emission (EVAP) System - Incorrect Flow Detected
Possible Cause:
Malfunction Indicator Lamp (MIL) active.
Evaporative Emission (EVAP) Canister Purge Regulator Valve faulty/jammed.
Evaporative Emission (EVAP) Canister Purge Solenoid Valve faulty/jammed.
Evaporative Emission (EVAP) Canister Sealing faulty.
Pipes between Tank Breathing and Throttle Body leaky/blocked.
Hose connection(s).
Intake leak.
Possible Solutions:
Check Evaporative Emission (EVAP) Canister Purge Regulator Valve .
Perform Output Test.
Check Evaporative Emission (EVAP) Canister Purge Solenoid Valve.
Check Evaporative Emission (EVAP) Canister.
Perform Basic Setting.
Check Pipes between Tank Breathing and Throttle Body.
VSV connector near air filter box disconnected.

Jun 15, 2009 | 1996 Chevrolet Monte Carlo

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