CEL Code P112F

preitlerf30 · 10-11-2021, 04:40 PM

Hello all, I recently blew my stock CP and installed the VRSF upgrade CP kit. Now running 2013 335i N55 PWG with muffler delete and this charge pipe. I believe I had a boost leak after install and had this fixed by the mechanic who installed the CP. The car has been running fine for about 2 weeks now but today I got a CEL. I ran diagnostics and received the code P112F - Manifold Absolute Pressure to Throttle Angle - Too High (Bank 1) I'll attach photos of the code reader. I've done an exhausting amount of research on the P112F code and can't seem to find a definitive answer to what the problem is. I've heard everything from it could be another boost leak, a throttle body problem, a solenoid problem, a map/maf sensor problem, to even a cylinder head problem. Does anyone have an idea what the solution is? I appreciate any and all help, thanks.

preitlerf30 · 10-11-2021, 04:43 PM

I'd also like to note that I plan on buying installing the JB4 and running Map 1 for a little until going F.B.O. Does anyone have any experience with the JB4 on the 2013 PWG 335? I'm excited to start the tune process once I get this damn P112F code figured out lol

preitlerf30 · 10-13-2021, 01:42 PM

bump??

n55david · 10-13-2021, 01:54 PM

I believe that comes up when there is a specific leak in the valve cover or equivalent etc... its not common however so I don't think you will find much help. a quick Google search showed valve cover being thrown around often for a leak.

jb4 is not the way to go anymore, that's so 2013 tbh. I'd look at bootmod3 or mhd.

thejeremyman9 · 10-13-2021, 02:29 PM

+1 for skipping JB4.

Also, without more info or a datalog, we're all just guessing at the problem.

preitlerf30 · 10-14-2021, 08:36 PM

Quote:

Originally Posted by Phantom10R

I believe that comes up when there is a specific leak in the valve cover or equivalent etc... its not common however so I don't think you will find much help. a quick Google search showed valve cover being thrown around often for a leak.

jb4 is not the way to go anymore, that's so 2013 tbh. I'd look at bootmod3 or mhd.

I see that bootmod3 stage 2+ isn't compatible with the PWG n55s. would that mean mhd is probably my best bet if wanting the option to go F.B.O.?

n55david · 10-14-2021, 08:37 PM

Quote:

Originally Posted by preitlerf30

Quote:

Originally Posted by Phantom10R

I believe that comes up when there is a specific leak in the valve cover or equivalent etc... its not common however so I don't think you will find much help. a quick Google search showed valve cover being thrown around often for a leak.

jb4 is not the way to go anymore, that's so 2013 tbh. I'd look at bootmod3 or mhd.

I see that bootmod3 stage 2+ isn't compatible with the PWG n55s. would that mean mhd is probably my best bet if wanting the option to go F.B.O.?

bm3 stage 2 is the equivalent of mhd 2+ fyi

preitlerf30 · 10-14-2021, 08:41 PM

Quote:

Originally Posted by Phantom10R

Quote:

Originally Posted by preitlerf30

Quote:

Originally Posted by Phantom10R

I believe that comes up when there is a specific leak in the valve cover or equivalent etc... its not common however so I don't think you will find much help. a quick Google search showed valve cover being thrown around often for a leak.

jb4 is not the way to go anymore, that's so 2013 tbh. I'd look at bootmod3 or mhd.

I see that bootmod3 stage 2+ isn't compatible with the PWG n55s. would that mean mhd is probably my best bet if wanting the option to go F.B.O.?

bm3 stage 2 is the equivalent of mhd 2+ fyi

i see. i clearly need to up my research game lol but thanks for the quick replys. weirdly enough the p112f code mentioned in the OP has disappeared (knock on wood). but i plan to map logs and info once i get the tuner. i might just stay stage 1 and not go with a downpipe, just want to keep my car reliable. forgot to mention it's 110k miles daily driven. thanks again

n55david · 10-14-2021, 08:43 PM

Quote:

Originally Posted by preitlerf30

Quote:

Originally Posted by Phantom10R

Quote:

Originally Posted by preitlerf30

Quote:

Originally Posted by Phantom10R

I believe that comes up when there is a specific leak in the valve cover or equivalent etc... its not common however so I don't think you will find much help. a quick Google search showed valve cover being thrown around often for a leak.

jb4 is not the way to go anymore, that's so 2013 tbh. I'd look at bootmod3 or mhd.

I see that bootmod3 stage 2+ isn't compatible with the PWG n55s. would that mean mhd is probably my best bet if wanting the option to go F.B.O.?

bm3 stage 2 is the equivalent of mhd 2+ fyi

i see. i clearly need to up my research game lol but thanks for the quick replys. weirdly enough the p112f code mentioned in the OP has disappeared (knock on wood). but i plan to map logs and info once i get the tuner. i might just stay stage 1 and not go with a downpipe, just want to keep my car reliable. forgot to mention it's 110k miles daily driven. thanks again

dp and stage 2 is reliable, don't worry.

thejeremyman9 · 10-14-2021, 10:17 PM

IC+CP and BM3 stage 1 or MHD stage 2

Add DP and go BM3 stage 2 or MHD stage 2+

No need to overthink it. DP doesnt affect reliability, but confirm emissions compliance.

Ashhong · 10-18-2021, 04:00 PM

Hey OP have you had any more issues with this code? I had it for a bit after messing with my intake manifold to get to the oil filter housing gasket. I'm experiencing low idle RPMs and engine shaking with the AC off. Did you see anything like thta?

preitlerf30 · 10-18-2021, 04:07 PM

Quote:

Originally Posted by Ashhong

Hey OP have you had any more issues with this code? I had it for a bit after messing with my intake manifold to get to the oil filter housing gasket. I'm experiencing low idle RPMs and engine shaking with the AC off. Did you see anything like thta?

Funnily enough the code hasn't showed up since the post, but I do get a rough/shaky idle every now and then on start up. I'd actually say it idle's better when I have the AC turned off, not the other way around. I'm still sitting stock other than the charge pipe and it seems to be driving fine as of now, still looking into tuning but we'll see.

preitlerf30 · 10-18-2021, 04:11 PM

Quote:

Originally Posted by Ashhong

Hey OP have you had any more issues with this code? I had it for a bit after messing with my intake manifold to get to the oil filter housing gasket. I'm experiencing low idle RPMs and engine shaking with the AC off. Did you see anything like thta?

Forgot to mention but the car idle's at about 600 RPM where it should be, I also make sure to let my engine heat up and get spinning before I'm on the road. Also should mention I do have a slightly leaky oil-gasket. Honestly not sure if it's a housing gasket or pan. Hope you can figure the code out because I haven't found much.

Ashhong · 10-18-2021, 04:52 PM

Quote:

Originally Posted by preitlerf30

Forgot to mention but the car idle's at about 600 RPM where it should be, I also make sure to let my engine heat up and get spinning before I'm on the road. Also should mention I do have a slightly leaky oil-gasket. Honestly not sure if it's a housing gasket or pan. Hope you can figure the code out because I haven't found much.

I let it sit for like 30 minutes idling, and with the AC off it idles around 600 as well, but it also drops down to about 5-550, at which point engine shakes and the car revs up to 1k. Code hasn't come back yet..but I also haven't taken it on the road yet.

Your leak is probably the oil gasket as it seems to be an extremely common problem, and a huge pain in the ass

thejeremyman9 · 10-18-2021, 06:07 PM

You can try unplugging the MAF as discussed here: https://f30.bimmerpost.com/forums/sh....php?t=1854945

10-11-2021, 04:40 PM	#1
preitlerf30 New Member 4 Rep 25 Posts Drives: 2013 BMW 335i Sport Line Join Date: Sep 2021 Location: NC iTrader: (0)	Code P112F after CP upgrade Hello all, I recently blew my stock CP and installed the VRSF upgrade CP kit. Now running 2013 335i N55 PWG with muffler delete and this charge pipe. I believe I had a boost leak after install and had this fixed by the mechanic who installed the CP. The car has been running fine for about 2 weeks now but today I got a CEL. I ran diagnostics and received the code P112F - Manifold Absolute Pressure to Throttle Angle - Too High (Bank 1) I'll attach photos of the code reader. I've done an exhausting amount of research on the P112F code and can't seem to find a definitive answer to what the problem is. I've heard everything from it could be another boost leak, a throttle body problem, a solenoid problem, a map/maf sensor problem, to even a cylinder head problem. Does anyone have an idea what the solution is? I appreciate any and all help, thanks. Attached Images
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10-11-2021, 04:43 PM	#2
preitlerf30 New Member 4 Rep 25 Posts Drives: 2013 BMW 335i Sport Line Join Date: Sep 2021 Location: NC iTrader: (0)	I'd also like to note that I plan on buying installing the JB4 and running Map 1 for a little until going F.B.O. Does anyone have any experience with the JB4 on the 2013 PWG 335? I'm excited to start the tune process once I get this damn P112F code figured out lol
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10-13-2021, 01:42 PM	#3
preitlerf30 New Member 4 Rep 25 Posts Drives: 2013 BMW 335i Sport Line Join Date: Sep 2021 Location: NC iTrader: (0)	bump??
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10-13-2021, 01:54 PM	#4
n55david Check out my Youtube @n55david! 1296 Rep 3,529 Posts Drives: 2017 m240i, 2015 X3 x35i Join Date: Aug 2018 Location: Michigan USA iTrader: (0) Garage List 2017 m240i xDrive [0.00] 2015 X3 x35i [0.00] 2015 335i xdrive [0.00]	I believe that comes up when there is a specific leak in the valve cover or equivalent etc... its not common however so I don't think you will find much help. a quick Google search showed valve cover being thrown around often for a leak. jb4 is not the way to go anymore, that's so 2013 tbh. I'd look at bootmod3 or mhd. __________________ 2017 m240i xDrive 10.99@122.86mph bootmod3 stage 2+ ots 2015 335i xDrive 10.95@124.99mph w/bm3 - SOLD 2015 X3 x35i pwg 12.96 catless w/bm3 stage 2 93 ots IG: @n55david For pics and updates! Youtube: @ n55david For videos or Racing etc
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10-13-2021, 02:29 PM	#5
thejeremyman9 Major General 4358 Rep 7,591 Posts Drives: 2015 BMW 335i Join Date: May 2019 Location: Cali iTrader: (0)	+1 for skipping JB4. Also, without more info or a datalog, we're all just guessing at the problem.
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10-14-2021, 10:17 PM	#10
thejeremyman9 Major General 4358 Rep 7,591 Posts Drives: 2015 BMW 335i Join Date: May 2019 Location: Cali iTrader: (0)	IC+CP and BM3 stage 1 or MHD stage 2 Add DP and go BM3 stage 2 or MHD stage 2+ No need to overthink it. DP doesnt affect reliability, but confirm emissions compliance.
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10-18-2021, 04:00 PM	#11
Ashhong Private First Class 18 Rep 138 Posts Drives: 2014 335i Join Date: May 2010 Location: Anaheim, CA iTrader: (1)	Hey OP have you had any more issues with this code? I had it for a bit after messing with my intake manifold to get to the oil filter housing gasket. I'm experiencing low idle RPMs and engine shaking with the AC off. Did you see anything like thta?
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10-18-2021, 06:07 PM	#15
thejeremyman9 Major General 4358 Rep 7,591 Posts Drives: 2015 BMW 335i Join Date: May 2019 Location: Cali iTrader: (0)	You can try unplugging the MAF as discussed here: https://f30.bimmerpost.com/forums/sh....php?t=1854945
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