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      05-20-2020, 10:11 PM   #1
exwon
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Code P0446 - EVAP VENT CONTROL CIRCUIT FAILURE

I own a 2017 X1. Got this code a month or so before corona. COVID-19 is nasty but I don't think it caused this code. Any idea what did?

The vehicle ran normally before and after the code appeared, and continues to run normally. It seemed to show up around the time after my key fob required a batter change, but I really don't want to go down a rabbit hole thinking it has anything to do with that - unless it does for some crazy reason.

This was the only link I found related to the problem for BMW:
https://www.carobdcodes.com/bmw-p044...formance.shtml

My vehicle will not pass inspection until this code is resolved.

Thanks for any thoughts you might have!
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      05-21-2020, 12:57 AM   #2
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Have you spoken to a dealer yet? It might be simple, it might not! A simple phone call may get the problem solved.
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      05-21-2020, 04:50 AM   #3
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https://www.obd-codes.com/p0466
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      05-21-2020, 03:14 PM   #4
exwon
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Thanks for the replies!

The link is a good one.

And I did call BMW tech who said it is most likely the valve in a line coming out of the gas tank. But they'd have to diagnose to know for sure, i.e., supply power to the valve to see if it fails to open or not. That diagnosis alone is pushing $150. If the valve is faulting, replacing it with a new one is pushing another $400 to $500 (ballpark estimate).

It could also very well be electrical, which I would think could be much less $ to fix.

Anyway, they don't see this code often with the X1.
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      05-23-2020, 06:23 AM   #5
rameer
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Quote:
Originally Posted by exwon View Post
Thanks for the replies!

The link is a good one.

And I did call BMW tech who said it is most likely the valve in a line coming out of the gas tank. But they'd have to diagnose to know for sure, i.e., supply power to the valve to see if it fails to open or not. That diagnosis alone is pushing $150. If the valve is faulting, replacing it with a new one is pushing another $400 to $500 (ballpark estimate).

It could also very well be electrical, which I would think could be much less $ to fix.

Anyway, they don't see this code often with the X1.
I had a similar issue few months back and took it to the dealership and they estimated for close 1000. So got it fixed outside and paid close to 300 I believe. It ended up being a vent value which apparently is a common problem in the model.

Dealership is wanted to replace intake muffler at the same time for some reason and I had no reason why.
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      05-25-2020, 10:06 PM   #6
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Quote:
Originally Posted by rameer View Post
I had a similar issue few months back and took it to the dealership and they estimated for close 1000. So got it fixed outside and paid close to 300 I believe. It ended up being a vent value which apparently is a common problem in the model.

Dealership is wanted to replace intake muffler at the same time for some reason and I had no reason why.
Thanks for the post. Dealerships, gosh... They'd probably want to first remove my tint citing difficulty seeing the issue.

It just happened that today, on my way back from home improvement store, I noticed the engine light was OFF! Maybe a fluke. I'll check it tomorrow. Been driving my other car past several days now that it's nice out. No idea if the X1 just sitting there cleared something but I was cautiously optimistic.

I had looked into a shop next to my normal one that works on European cars and has a "smoke gun" tool to see if the valve opens properly... But maybe I'll just try to get it inspected next month, if the engine light continues to stay off by then! Cuz driving the car seems to have zero effect from the code...
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