Question about 2004 Hummer H2

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CODE PO441 , Smoked system , found smoke at filter under purge silanoid ,right of battery, normial , i believe so , NO OTHER LEAKS DETECTED , replaced e-vap silanoid and e-vap purge motor ,bench check showed old ones o.k. Replaced fuel cap ,NAPA STANT, silacone grease on gas cap 0 ring proved complete sealing service .cleaned PCV valve,ball rattles and opens and closes tight with air pressure,pulled air intake plentum , all hoses are fine, pulled idle control and cleaned ,works fine, pulled and cleaned off light carbon build up from EGR valve on side of throttle body and reinstalled , seals tight ,cleaned throttle body,12 volt DC power at all times to purge silanoid and purge motor, WHILE ENGINE RUNNING, before silanoid replacement with new one, got one from junk yard , installed with engine running and check engine light on, when power connection made to silanoid . instant fast opening and closeing with clicking of silanoid,light stayed on. disconnected battery for 1/2 hr,light went and stayes off for 10 or 12 start ups, same thing with new silanoid, except no ingagment or clicking even when battery and PCM are both disconnected and reconnected after 1/2 hour, HAVE NOT REPLACED CANNISTER YET, Have not dropped fuel tank to check for problems, NO SMOKE FROM TOP OF GAS TANK WHEN SYSTEM WAS SMOKED . ENGINE IDLES FINE WHEN CHECK ENGINE LIGHT IS OFF FROM BATTERY RESET, IDLES FAST WHEN CHECK ENGINE LIGHT COMES BACK ON , THAN WITH KEY CHECK, CODE PO441 REAPEARS , CLEARS OUT WITH BATTERY RESET, BUT CODE SHOWES BACK UP WITH CHECK ENGINE LIGHT BACK ON ., MY WIFE HAS CANCER AND I HAVE HAD HEART ATTACTS, WE BOTH ARE ON SOCIAL SECURITY, VERY LIMITED FUNDS. PLEASE PLEASE PLEASE HELP ME WITH KNOWLAGABLE FIX . THANK YOU, AND MAY GOD BLESS. I am using a hanes manual for this dodge darango .

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0441 the most common fix for this code in chrysler/dodge vehicles is to replace the leak detection pump / ldp -----other areas to check would be damage / restriction in evap line / canister---faulty purge solenoid or connection damage or resistance in line -bad vacuum switch

Posted on Apr 29, 2010

Testimonial: "Thanks for all your help, all checked except for a possable vacum switch or relay, whats the location of these? not in my wireing diagram or photo."


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Engine light code po441 on

This code indicates a purge flow problem in the evap emissions. It could be caused by a disconnected hose/disconnected purge valve/defective purge valve/computer or wiring issue. Has any work been performed under the hood? Air filter replaced? that may have led to a hose coming off? This vehicle is under warranty. Give the dealer a call and they will correct the problem for you

Jan 06, 2016 | 2015 Kia Soul

1 Answer

Why, when I smoked the evap system with the key off and the smoke went smoke went Through the, Fuel Purge Pipe, charcoal canaster ,Canister vent shut valve, Canister filter and came out through the frame...

what year car? , what model , cx, dx,vx? got DTCs/ what?
no DTC's but are diagnosing stink? fuels for a customer?
just a hint?

EVAP level 1,2,3? 89 to present?
there are 7 or more tests, 23 pages in my FSM. got that book?
and for sure one test is the purge that does smoke.
you must test all modes, to get them all working.
both parked, running and test modes (ECU monitor check devices)
i you lack the pages, ask.

Oct 14, 2013 | Honda Civic Cars & Trucks

1 Answer

Codes0441 0442 0455 0456

codes po441 po442 po455 po456. code po441 - EVAP system no flow during purge conditions.code po442 -EVAP system small leak detected conditions. code po455 - EVAP system large leak detected conditions.code po456 - EVAP system very small leak detected. possible causes loose damaged missing fuel cap.fuel tank sensor disconnected or failed. ORING on top fuel sending unit leaking.purge valve vapor line clogged disconnected or purge solenoid failed.vent solenoid not closing or has failed.

May 23, 2013 | 2002 Dodge Durango

1 Answer


po421 catalytic converter code [warm up catalyst efficiency below threshold bank 1] means the o2 sensor is detecting low oxygen in exhaust problem can be cat conv going bad---o2 sensor faulty-and or bad spark plug to the p0441 evap system[-evap emissions control system incorrect purge flow ] this is a system code meaning any part of the evap can have problem will need to check the fuel lines vapor lines for damage or breaks-check purge valve -purge valve solenoid- canister- and vacuum lines

Apr 10, 2013 | 2003 Mitsubishi Lancer

1 Answer

Code po441 03 serento evaporative emission system incorrect

could be a bad purge valve on the vapor canister under the car by the fuel tank.

Dec 02, 2012 | 2003 Kia Sorento

1 Answer

What is the part need to buy for pO441,po440,po446

Codes have nothing to do with parts

You need to study OBD2 Systems on the internet,
as well as look up those codes & the causes

Google them

( 1998 Toyoya Camry OBD2 PO441)

PO441---EVAP System Incorrect Purge Flow
PO440---EAVP Control System Malfunction
PO446---EAVP Vent Control Circuit Malfunction

I think a repair shop is your best bet to smoke test
system & resolve

Nov 17, 2012 | 1998 Toyota Camry

1 Answer


you have a small evaporative system leak.First ,replace the gas cap,if this does't clear your MIL, then comes the hard part.yo have tocheck every emission hose from the gas tank filler tube to the canister.These are sometimes very small air leaks, coming from worn hoses,brittle and fragile.Before you do any of thi s you must first jack up the car ,Slide under'll even have to check the canister it's self ,and the Purge vale solenoid.If you can detectnothing(no Air coming from any of the hoses), And you still light up after you replace vthe Gas Cap,Take your Neon to a shop so thatey can pressurize theSystem with smoke where the smoke exits, marks theleak, problem solved!

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Jun 04, 2012 | 2002 Chrysler Concorde

1 Answer

I'm receiving an Error code po441, I took it to the dealer who replaced the EGR valve and reset the engine light and cleared codes a week ago, now my engine light just came back on with same code

Some dealer you got there

PO441-EVAP System --Incorrect Purge Flow

They may have found an EGR Valve issue,
but they certainly blew off the EVAP Code

I would guess you have a bad EVAP Canister
Purge Valve or some other purge control

Feb 15, 2011 | Chrysler Town & Country Cars & Trucks

2 Answers

1997 toyota camry check engine light on codes are po441,po446

p0446 is an evap code for incorrect purge flow, check the rear vacume switching valve. its above the rear sub frame

Apr 05, 2009 | 1997 Toyota Camry

1 Answer

96 corsica error cod po441 no purge flow

Look, that code means:
P0441 - Evap emission control system Incorrect purge flow

so try to replace the emission control.

Jun 15, 2008 | 1996 Chevrolet Corsica

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