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      01-18-2019, 07:29 PM   #1
joeswamp
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Drives: 2011 135i convertible
Join Date: Dec 2018
Location: Boston

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Code P10FA on a 2011 135i

Does anyone know what code P10FA means? I can't seem to find it anywhere.

The yellow check engine symbol appeared on the way to work this morning, but the car seemed to be running fine. When I started the car at the end of the day to go home, it stumbled/stalled a couple of times and the "SERVICE ENGINE SOON" light lit (I think that means there's an emissions problem). Once it warmed up it seemed to run fine. It's about 30degF here.

When I got home I hooked up the scanner and got P10FA and P0171 (lean mixture). P0171 is a generic code but P10FA I think is BMW specific. Can't seem to find it on any list. This is a 2011 N55 engine.

Also -- where's a good place to look up these codes? I found a great list someone posted here but it doesn't include P10FA.

Thanks in advance for any help...

EDIT: Of course, right after I post this I find the place:

http://bmwfault.codes

P10FA is a weird fault: It says the fuel rail pressure was too high before engine start (so the sensor is suspect). Maybe this is how I'm getting a lean P0171 condition -- the rail pressure is measuring high, so the injectors are closing too much?

Last edited by joeswamp; 01-18-2019 at 07:38 PM..
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