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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 10-19-2007, 04:37 PM
davewigs davewigs is offline
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Mein Auto: 2003 bmw 540i
Question HELP Troubleshooting Code P0443 on my 03 540i Sport

Took my 03 540i sport to AutoZone and they hooked up my car to thier handheld computer and it provided the P0443 code - apparently this is the code for whatever caused my service engine soon light to come on twice!

Here is what the Zone's printout said:

The PCM has determined that a malfunction exists in the electrical circuit for the purge control valve in the evaporative emission control system.

Definition
EVAP (Evaporative Emission System) purge/vent solenoid circuit condition

Explanation
The solenoids and system wiring are monitored for opens or shorts

Probable Causes
1. Purge or vent solenoids defective
2. Check connector and wiring
3. Fuel saturated vapor canister
4. Failed EVAP vent solenoid

My gas gauge went under 1/4 tank and the SES light came on. I took filler cap off and put it back on but the SES light stayed on. Drove car over to gas depot and filled her up - SES light went off. Couple of weeks later same thing?

Not good with this kinda thing? Any ideas out there! Is there any quick (inexpensive) fixes to the the above probable causes.

Sorry for the long post but wanted to provide as much info as possible in case somebody has run into this.

Also put this post on the M5 site.

thanks
dave
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  #2  
Old 10-19-2007, 08:49 PM
davewigs davewigs is offline
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  #3  
Old 10-20-2007, 04:14 PM
cferrante cferrante is offline
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I just started having the same problem and got the same code print out from Autozone. I just ordered a new gas cap for $23 to see if that is the problem. I'll let you know if this fixes it.
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  #4  
Old 10-21-2007, 06:33 PM
davewigs davewigs is offline
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bump
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  #5  
Old 10-21-2007, 07:11 PM
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Jalli Jalli is offline
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Check out causes 1,2, and 4... I think they are the most likely. As for how to confirm that the problem lies in one of these components, I think you need to make a trip to your local mechanic..

I can't think of a real quick fix, but do not ignore it. Messing around with vaporized alkanes usually leads to wonderful explosions...
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  #6  
Old 10-31-2007, 06:24 PM
cferrante cferrante is offline
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Update, so far so good. I've put on about 700 miles and on my third tank of gas and the code hasn't come back with the new cap.
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  #7  
Old 10-31-2007, 11:43 PM
mkarner79 mkarner79 is offline
Not another blue puddle!
Location: Dallas, TX
 
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When the purge valve first starts to fail it will trip your SES light, but it after a few starts it will turn off. I bought a new gas cap thinking that was the fix. My SES light didn't come back on for well over 1000 miles. I reset it (p0443) before I went on a long road trip from Santa Barbara Cal to Portland OR and it didn't turn back on until I was close to getting home. The SES light randomly turned on and off for a few weeks before it finally stopped turning off. At that point I gave in and bought a new purge valve ($80). Thousands of miles later no SES or p0334. (and much better gas mileage!)

Don't waste your money on a gas cap. It's your purge valve, for sure...save the $23.
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  #8  
Old 10-31-2007, 11:44 PM
mkarner79 mkarner79 is offline
Not another blue puddle!
Location: Dallas, TX
 
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I meant to say p0443
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  #9  
Old 11-03-2007, 10:30 AM
528idriver 528idriver is offline
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Hi there,


I just went to my local mechanic to get my 97 528i inspected and the check engine light was on. They ran the computer and this is the code it brought up P0443 - Evaporative Emission System Purge Control Valve Circuit.


Are they easy to find on the car and how expensive are they?


I also had this code come up too.

P0111 - Intake Air Temperature Sensor 1 Circuit Range/Performance


Anybody know anything about that one too? Any info is greatly appreciated. Thanks a million
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  #10  
Old 05-11-2010, 08:11 AM
Greg64 Greg64 is offline
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Purge Valve

Does anyone have the OEM Part Number for the purge valve?
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  #11  
Old 05-11-2010, 09:41 AM
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DHoang DHoang is offline
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p0443 is a fuel tank vent valve. It's located in the engine, hangs off an L bracket from the intake manifold on the i-6. There's two hoses going to it, one coming off the l. fender and the other from beneath the intak manifold. These hoses are very special hoses from the rest b/c they dont collapse when you try to pinch them. It's designed that way.
Also, an electical plug connects to this valve.



Hopefully, the pic below shows better the vent valve (w/ lines snapped off)...
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Old 05-11-2010, 09:59 AM
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DHoang DHoang is offline
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Quote:
Originally Posted by 528idriver View Post


I also had this code come up too.

P0111 - Intake Air Temperature Sensor 1 Circuit Range/Performance


Anybody know anything about that one too? Any info is greatly appreciated. Thanks a million
The intake air temp sensor 1 is this sensor (see link) that snap fits into & underneath the intake, in between the CCV grommet and the ICV grommet.

It may just be that the green oring or gasket trim ( shown hanging off my hand) is leaking, in which case the sensor's normally aok, or dirty air is getting sucked into the intake anywhere between the MAF and throttle body, bypassing the air filter, then this may be what's causing the air temp sensor to clog up and throw a code

note: only 97-98s have this sensor, iirc...
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  #13  
Old 12-05-2014, 05:24 PM
Arkum Arkum is offline
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This was today's issue.... I cleared the code and it came right back on. If its not gone next week I'll get a new purge valve. It doesn't look too difficult to replace
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