P0456 code 2020 m340i

Chris177 · 03-22-2020, 08:51 AM

Has anyone had this code yet? Its a small evap leak. Its been on for 2 tanks of gas so I know its not the gas cap, and its tight. I just don't want to drive almost 2 hours to the dealer unless I have too. I attached the code list. Car has 12k on it. Thanks!
Chris

tazzi831 · 11-27-2020, 11:58 AM

What did this end up being? Just got the code thrown this week. I plan to check the gas cap, clear the code and see if it comes back.

darknemesis · 05-12-2021, 01:36 PM

I had the same code thrown recently, what resolution did you guys took ? I have checked the gas cap and the fit looks fine. No service availability at the dealership nearby.

ALotOfKirbys · 05-12-2021, 09:39 PM

Could be a O2 sensor error that could be causing it.

jalkster · 05-18-2021, 04:59 PM

Had this happen on my F30 340i… I was running 20" wheels and the right rear wheel actually slowly rubbed through the fender liner, into the gas line. Doubt this is what happened but figured Id share.

Keane1975 · 05-29-2021, 11:05 PM

I got the same code in my car. Anyone figure out what it was ?

03-22-2020, 08:51 AM	#1
Chris177 New Member 3 Rep 10 Posts Drives: 2020 BMW M340i Xdrive Join Date: May 2019 Location: Florida iTrader: (0)	P0456 code 2020 m340i Has anyone had this code yet? Its a small evap leak. Its been on for 2 tanks of gas so I know its not the gas cap, and its tight. I just don't want to drive almost 2 hours to the dealer unless I have too. I attached the code list. Car has 12k on it. Thanks! Chris Attached Images
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11-27-2020, 11:58 AM	#2
tazzi831 New Member 2 Rep 6 Posts Drives: BMW M340i Join Date: Nov 2019 Location: Bay Area, CA iTrader: (0) Garage List 2020 BMW M340i [0.00]	What did this end up being? Just got the code thrown this week. I plan to check the gas cap, clear the code and see if it comes back.
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05-12-2021, 01:36 PM	#3
darknemesis Enlisted Member 16 Rep 34 Posts Drives: '20 M340xi, '17 Honda Civic Join Date: Aug 2019 Location: Boston, MA iTrader: (0)	I had the same code thrown recently, what resolution did you guys took ? I have checked the gas cap and the fit looks fine. No service availability at the dealership nearby.
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05-12-2021, 09:39 PM	#4
ALotOfKirbys Private 54 Rep 81 Posts Drives: BMW 2021 M340i xDrice Join Date: Nov 2020 Location: New York iTrader: (0)	Could be a O2 sensor error that could be causing it.
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05-18-2021, 04:59 PM	#5
jalkster Lieutenant 220 Rep 579 Posts Drives: X3MC Join Date: Jan 2017 Location: Dallas, TX iTrader: (3)	Had this happen on my F30 340i… I was running 20" wheels and the right rear wheel actually slowly rubbed through the fender liner, into the gas line. Doubt this is what happened but figured Id share. __________________ Current: 2021 M340i Previous: 2020 X3M Comp BM3 E30 & 2016 340i 8AT DME Stage 2 \| FBO/Catless Meisterschaft Catback \| Ohlins R&T
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05-29-2021, 11:05 PM	#6
Keane1975 New Member 3 Rep 5 Posts Drives: BMW M340i Join Date: Oct 2019 Location: Houston , Texas iTrader: (0)	I got the same code in my car. Anyone figure out what it was ?
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