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BMW 3-Series (E90 E92) Forum
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Replaced valve cover
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01-07-2020, 09:23 PM | #1 |
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Replaced valve cover
I replaced my valve cover and reinstalled with a new gasket and now I'm getting codes
P112f- Manifold absolute pressure to throttle angle -too high (bank 1) P0171- system too lean (bank 1) Any ideas what's wrong with it? |
01-08-2020, 08:49 AM | #3 |
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01-08-2020, 08:52 AM | #4 |
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01-08-2020, 08:54 AM | #5 | ||
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01-08-2020, 08:55 AM | #6 | |
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https://www.ecstuning.com/b-genuine-...e/11157553949/ |
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01-08-2020, 08:56 AM | #7 |
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01-08-2020, 08:58 AM | #8 | |
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01-08-2020, 09:01 AM | #9 | |
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The hose i was talking about is for N54 engine. |
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01-08-2020, 09:05 AM | #12 |
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01-08-2020, 09:28 AM | #13 |
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No problem thank you guys for trying to help!
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01-08-2020, 09:51 AM | #14 |
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I know I broke the crankcase vent hose at the front left of the valve cover when I replaced mine. Also if I recall correctly there are one or two vacuum lines you have to disconnect when replacing. Are you sure those are all connected/not broken?
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01-08-2020, 09:55 AM | #15 |
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The two vaccume lines to the valve cover are installed but there is a line that goes from my cold air intake to my valve cover that definitely looks cracked. Is that the crankcase breather hose?
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01-08-2020, 12:49 PM | #16 |
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Yeah I believe so. Although thinking about it more I doubt it matters if it's cracked... essentially just feeds to atmosphere either way.
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01-08-2020, 01:42 PM | #17 |
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Based on the codes it sounds like a vacuum leak, perhaps the valve cover hasn't fully seated? Search thoroughly for an oil leak.
Both hoses are connected on the passenger side? 1 goes to the boost solenoid and the other to the exhaust flap. When you remove the oil cap do you feel/hear suction?
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01-08-2020, 08:31 PM | #18 | ||
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