P0441 Evap Emission Control System Incorrect Purge Flow
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P0441 Evap Emission Control System Incorrect Purge Flow
The Check Engine Light of my C220 has come on. She has done a little over 1,00,000 miles...
I took to AAP and got a diagnostic done. It read "P0441 Evaporative Emission Control System Incorrect Purge Flow".
Can anybody help in diagnosing wots causing it...??
I hv chkd the gas cap...it seems to be fine and shut tight...
________________
96 C220
I took to AAP and got a diagnostic done. It read "P0441 Evaporative Emission Control System Incorrect Purge Flow".
Can anybody help in diagnosing wots causing it...??
I hv chkd the gas cap...it seems to be fine and shut tight...
________________
96 C220
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98 C-230
Hi Welcome to the Boards.
I would check the pvc valve, then all the vacum lines real good first, if they are cracked, plugged or look cruddy, replace them (one at a time!!!!) and then the charcoal canister for cracks next. after that it may be a vapor pressure sensor, or a short in the sensor circut, or a vacum switching valve. Hope it's easy to find and cheap to fix. Good Luck.
I would check the pvc valve, then all the vacum lines real good first, if they are cracked, plugged or look cruddy, replace them (one at a time!!!!) and then the charcoal canister for cracks next. after that it may be a vapor pressure sensor, or a short in the sensor circut, or a vacum switching valve. Hope it's easy to find and cheap to fix. Good Luck.
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Whats the PVC..is it the purge valve...??
Offlate I have been experiencing a couple of other problems...
The brakes tend to grab when coming to a stop...the engine also surges for a second...or two...the brakes act funny only at very low speeds or when coming to a stop....
The engine emanates a knocking sound when I rev up in park or neutral or accelerate in drive...for a very short time....I dont hear that sound when I'm normally cruising....The sound is more like that of a worn connecting or crankshaft bearing....But then if thats the case shouldn't it be constant...the engine runs smooth when cruising normally...even at higher speeds.....The sound comes for a very short time...
The transmission tends to hesitate a bit before changing gears..
Would adding a bottle of Trans-X help..??
_____________
96 C220
Offlate I have been experiencing a couple of other problems...
The brakes tend to grab when coming to a stop...the engine also surges for a second...or two...the brakes act funny only at very low speeds or when coming to a stop....
The engine emanates a knocking sound when I rev up in park or neutral or accelerate in drive...for a very short time....I dont hear that sound when I'm normally cruising....The sound is more like that of a worn connecting or crankshaft bearing....But then if thats the case shouldn't it be constant...the engine runs smooth when cruising normally...even at higher speeds.....The sound comes for a very short time...
The transmission tends to hesitate a bit before changing gears..
Would adding a bottle of Trans-X help..??
_____________
96 C220
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Joined: Sep 2004
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98 C-230
Hi
The PVC valve is what vents the crankcase to outside air. when the oil gets hot and the internals are spinning around the air inside the engine is at a higher pressure than the outside air. long story short the PVC valve lets it breathe. As for the brakes grabbing, does it have decent pads? If so maybe a warped rotor. The surgeing engine is a little harder to guess at, could be several things. My Guess is it's related to your evap code. did it start when you got the code? was it ok before? Are you throwing any other codes? A leak in engine vacum can cause a surge in revs. I'd still check the vacum system first. As for the knock, Is anything loose under there like the exaust banging onto somthing or the like? A rod will knok all the time. If you want to check pull the plugs( check those out too if you haven't done so in a while ) out to stop compression from working aginst you, grab the harmonic balancer turn it back and forth and feel for slop. You will feel it if a rod bearing is bad in most cases. I kinda think it's something hanging loose and banging at an idle. Don't put ANY addative into your transmission. mb approved synthetic fluid only. Have it changed if you havent already. yes it's high $, but transmissions are hella high $$$$. Sounds like a busy weekend, good luck
The PVC valve is what vents the crankcase to outside air. when the oil gets hot and the internals are spinning around the air inside the engine is at a higher pressure than the outside air. long story short the PVC valve lets it breathe. As for the brakes grabbing, does it have decent pads? If so maybe a warped rotor. The surgeing engine is a little harder to guess at, could be several things. My Guess is it's related to your evap code. did it start when you got the code? was it ok before? Are you throwing any other codes? A leak in engine vacum can cause a surge in revs. I'd still check the vacum system first. As for the knock, Is anything loose under there like the exaust banging onto somthing or the like? A rod will knok all the time. If you want to check pull the plugs( check those out too if you haven't done so in a while ) out to stop compression from working aginst you, grab the harmonic balancer turn it back and forth and feel for slop. You will feel it if a rod bearing is bad in most cases. I kinda think it's something hanging loose and banging at an idle. Don't put ANY addative into your transmission. mb approved synthetic fluid only. Have it changed if you havent already. yes it's high $, but transmissions are hella high $$$$. Sounds like a busy weekend, good luck
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The brake pads are almost new..
The engine used to surge even before the check engine light came on...
There are no other codes coming up except for P0441
Where is the harmonic balancer located..??
The sound is coming from the engine bay ...kinda of a sharp metallic noise..
I will chk the vacumm lines for any leaks ...guess its going to b a busy weekend after all...
Appreciate your help on this...
The engine used to surge even before the check engine light came on...
There are no other codes coming up except for P0441
Where is the harmonic balancer located..??
The sound is coming from the engine bay ...kinda of a sharp metallic noise..
I will chk the vacumm lines for any leaks ...guess its going to b a busy weekend after all...
Appreciate your help on this...
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98 C-230
Hi
I don't mind. that's what this board is for.
Assuming the car has had the oil changed on a semi-regular basis, at 100,000 i think your bottom end should be fine. the harmonic balancer is on the front of the crankshaft. "it's the big pulley at the bottom of your engine". ive never heard your car run but because of the mileage and the reputation of mercedes engines, I kinda doubt it's a rod. Have you ever changed the plugs? how bout the wires? I am not saying you should throw parts at it, i just don't know your car's maintanance history. But is it possible that the surge and sound you hear at idle is a cylinder missing? If so it would stop being audible for the most part as it is reved up.do you have any power loss? Just an idea. On the brakes if the pads are good and it's still grabbing i would suspect a warped rotor.
I don't mind. that's what this board is for.
Assuming the car has had the oil changed on a semi-regular basis, at 100,000 i think your bottom end should be fine. the harmonic balancer is on the front of the crankshaft. "it's the big pulley at the bottom of your engine". ive never heard your car run but because of the mileage and the reputation of mercedes engines, I kinda doubt it's a rod. Have you ever changed the plugs? how bout the wires? I am not saying you should throw parts at it, i just don't know your car's maintanance history. But is it possible that the surge and sound you hear at idle is a cylinder missing? If so it would stop being audible for the most part as it is reved up.do you have any power loss? Just an idea. On the brakes if the pads are good and it's still grabbing i would suspect a warped rotor.
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I looked around for the Purge valve...
Could not find it... Next to the w/s washer reservior all I could see is the
ABS pump... The ABS pump does not tick or feel like it working even with the
engine running... Is this how it is supposed to be..???
Does the ABS start working when u slam on the brakes..?
Is the purge valve under the w/s reservior...??
___________
96 C220
Could not find it... Next to the w/s washer reservior all I could see is the
ABS pump... The ABS pump does not tick or feel like it working even with the
engine running... Is this how it is supposed to be..???
Does the ABS start working when u slam on the brakes..?
Is the purge valve under the w/s reservior...??
___________
96 C220
Thread Starter
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Joined: Jan 2005
Posts: 21
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Hi,
I finally found the Purge valve...
I checked the purge valve....found that the terminals were corroded...
I cleaned the terminals...chkd the voltage at the connector..( 11.75 V)
Connected and checked again...Now with the switch turned on w/o the engine started the purge valve was not operational even though there was voltage at the connectors. I started the engine and after sometime the purge valve started ticking... I shut the engine...restarted...same...The purge valve started working after some time....Is this how it suposed to be...?
Or should it start working the moment you switch on the ignition?
Now that the purge valve started working I went about resetting the Check Engine Light.... Tried AZ...they said they cannot...So disconnected the battery for a couple of mins...and lo and behold...the CEL was reset..
Drove the car for an hour...The light hasn't come up yet...
If the fault still exists how long would it take for the CEL to come on again..??
I finally found the Purge valve...
I checked the purge valve....found that the terminals were corroded...
I cleaned the terminals...chkd the voltage at the connector..( 11.75 V)
Connected and checked again...Now with the switch turned on w/o the engine started the purge valve was not operational even though there was voltage at the connectors. I started the engine and after sometime the purge valve started ticking... I shut the engine...restarted...same...The purge valve started working after some time....Is this how it suposed to be...?
Or should it start working the moment you switch on the ignition?
Now that the purge valve started working I went about resetting the Check Engine Light.... Tried AZ...they said they cannot...So disconnected the battery for a couple of mins...and lo and behold...the CEL was reset..
Drove the car for an hour...The light hasn't come up yet...
If the fault still exists how long would it take for the CEL to come on again..??
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1996 Mercedes C280
I have a 1996 Mercedes C280 the check engine light is on and gives a Dtc code of P0441 ( Purge Flow Falt ) Where is the Purge Valve and how can I tell if it needs to be replaced help need to get a staye inspection ASAP
