Thread: N55 P-Code
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      02-13-2013, 09:21 PM   #1
c_ozanich
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Drives: '11 135i 6MT M-Pack
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N55 P-Code

I installed BMS intake about a week ago; drove around, SES came on, went into limp mode. Turned off and turned back on...ran fine

Yesterday it came back on (light, no limp mode)

I cycled starting it a few times and nothing so went to have it read. P-Code is P2177--system to lean off idle speed bank 1

I searched and couldn't find the code on here. Any thoughts on where to start? Not sure if that's referencing a vac line somewhere or the maf sensor? I assume its something I did bc it ran fine before.
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