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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Mechanical Maintenance: Break-in / Oil & Fluids / Servicing / Warranty > Help



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      02-03-2016, 11:28 AM   #1
Kenneykickin
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Help

Hey guys quick question. I'm pulling code p0456 ( very small emission system leak ) it just popped up when k was leaving the store.

The day before that I cleaned the maf sensor and the solenoids with maf cleaner. Put it all back was fine no check engine light after cleaning. Next day after leaving store I started car and it was on.

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      02-03-2016, 04:33 PM   #2
Kenneykickin
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I looked at gas cap it looks fine. I'm just not sure what's going on, no loss of power that I can tell.
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      02-16-2016, 08:38 PM   #3
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Anyone have any idea? Tried using the gas cap from my 335i and swapped it onto my n52 and reset battery left net terminal off for 2 minutes than re attached and restarted car. Ses light did not go away.

Any idea? Please help.
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      02-16-2016, 11:11 PM   #4
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You'll have to clear the code if u haven't already.
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      02-18-2016, 12:41 PM   #5
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You have an evap leak, you need to do a smoke test to find it.

Bash Shah
Sutton Premier Realty
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      02-18-2016, 05:37 PM   #6
Kenneykickin
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Quote:
Originally Posted by Bamaben View Post
You'll have to clear the code if u haven't already.
Yeah I didn't try to clear code. If it IS my gas cap I have to clear code? It won't go away with resetting battery?

Thanks for reply.
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      02-18-2016, 05:40 PM   #7
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Quote:
Originally Posted by DarkNemesis View Post
You have an evap leak, you need to do a smoke test to find it.

Bash Shah
Sutton Premier Realty
Oh lovely... What's the going rate for a "smoke test" the code says it's a very fine leak.
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      02-19-2016, 01:04 AM   #8
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Quote:
Originally Posted by Kenneykickin View Post
Oh lovely... What's the going rate for a "smoke test" the code says it's a very fine leak.
I paid 65 about 3 years ago on my e46 m3.
Canadian.
You just to phone around to see if they have a smoke machine and how much.
Should not be more than 2 hours labour.

Your charcoal filter is located on the rear left under the bumper, so make sure they get in their with a flash light some how.
Behind your left rear wheel.
Did you have an exhaust work done before this issue by chance?

Bash Shah
Sutton Premier Realty
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