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Old 05-19-2017, 12:56 AM   #1
az_330
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250 Functional Check TEV error code:(

Been battling this code for a while now. What exactly does it mean and how do I fix it? Just can't find much info on this one online.

2001 330CI w/ 5 speed.




Last edited by az_330; 05-19-2017 at 12:58 AM.
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Old 05-19-2017, 09:48 AM   #2
armenh7
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Quote:
Originally Posted by az_330 View Post
Been battling this code for a while now. What exactly does it mean and how do I fix it? Just can't find much info on this one online.

2001 330CI w/ 5 speed.



Is this code from inpa? Is your check engine light on? If so, it's best to use an OBDII scanner and get the PXXXX codes.
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Old 05-20-2017, 04:12 PM   #3
az_330
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Yes, from INPA.

No. This code does not show up on any OBDII scanners I've used.

Whenever I clear codes this functional TEV code comes back quick.... within a day or so of driving.

Last edited by az_330; 05-20-2017 at 04:13 PM.
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Old 05-20-2017, 09:43 PM   #4
armenh7
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Yes, from INPA.

No. This code does not show up on any OBDII scanners I've used.

Whenever I clear codes this functional TEV code comes back quick.... within a day or so of driving.
Do any codes show up though?
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Old 05-21-2017, 11:17 PM   #5
az_330
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1 day I'll have a code for SAP... I'll clear it and the next day I will get a code for TPS/MAF malfuntion. Clear that and the next day it's some other random thing.


But the functional check TEV code ALWAYS comes back. It is the only consistently recurring code.


I read something online about how the throttle bodies out of 2002 or older E46s have issues and can cause problems. So I purchased one out of a 2004 330ci with same part number and plan on swapping those out sometime this week when I have time. Not sure if it will make any difference but I guess we'll see.

Also plan on replacing both crankshaft position sensors and O2 sensors as preventative maintenance since those seem to be cause some problems with these cars.

Also not sure if it's related but I have a "surge" issue in 1st gear as well that is covered in this thread.... never figured that one out.
http://forum.e46fanatics.com/showthr...443&highlight=

Last edited by az_330; 05-22-2017 at 02:43 AM.
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Old 05-22-2017, 04:46 AM   #6
blarf
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do you park near poodles?
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Old 05-22-2017, 09:50 AM   #7
armenh7
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forum.e46fanatics.com/showthread.php?t=741843
forum.e46fanatics.com/showthread.php?p=10101899
https://blog.bavauto.com/10512/bmw-f...reather-valve/
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Old 05-22-2017, 08:30 PM   #8
az_330
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I had no idea it was a relief valve to the fuel tank. Numerous google searches on the code came up nothing but guess I should have just searched the term TEV BMW.

I should mention that a few weeks back I was filling my tank but the gas stations pump malfunctioned and dumped gas EVERYWHERE because it did not click off. It just kept spewing gas even though my tank was full.

A day or two after that I got a incorrect purge flow code so I removed the charcoal canister box and let it air dry overnight. Reinstalled and the light came on once or twice more but hasn't come back since.

I think I got this now that I know what I'm dealing with. Thanks guys.
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Old Yesterday, 11:27 PM   #9
az_330
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Was about to purchase a new fuel tank breather valve when I saw this. Code 250 "purge function plausibility" relates to the reaction of the O2 sensors.... should I just go ahead and replace the fuel tank breather valve with a new OEM unit anyway? I plan to replace my O2 sensors eventually. Not sure what the exact problem is here.

Realized it's hard to read... it says "250 - Purge Function Plausibility - This functional check looks for the reaction of the O2 sensor signal during canister purging. The O2 sensor, Air Flow meter, and RPM values must react to the purging of the canister."


Last edited by az_330; Yesterday at 11:34 PM.
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Old Yesterday, 11:31 PM   #10
armenh7
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Quote:
Originally Posted by az_330 View Post
Was about to purchase a new fuel tank breather valve when I saw this. Code 250 "purge function plausibility" relates to the O2 sensors.... should I just go ahead and replace the fuel tank breather valve with a new OEM unit anyway? I plan to replace my O2 sensors eventually.

Well, you did mention that one time your tank got overfilled and fuel spilled. If it isn't too expensive and you don't mind buying it, why not? Maybe your O2 sensor doesn't fix it, so that'll be one thing checked off. Also, the searches for the code relates to the valve, so maybe the O2 sensors are a possibility, but the breather valve has a higher chance.
Just my $0.02
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Old Today, 02:45 AM   #11
az_330
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Picked up a used tested and working OE one from ebay for $18. Hopefully that fixes it.

Last edited by az_330; Today at 02:45 AM.
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