[335twins]

Hi All,

I just got a CEL on my 2012 X3 35i (110k miles), its P112F (MAP sensor), anyone ran into this CEL and replacing MAP sensor resolved it?

Thank you

[turnstile]

Im in the middle of a nightmare with the code P112F. 2012 x3 35i w/ 128,xxx miles. The charge pipe and MAP were replaced about 9 months ago but didn't solve the intermittent problem. Car runs great except for a rough idle. Had it at a good BMW specialist here in LA, and they couldn't find the source after having the car for 3 days. They ruled out any intake leaks (did pressurized smoke tests), carbon build up, fuel line air leaks, valve cover, oxygen sensor stems, etc. The list went on. They want to take apart the top end to do tests on the timing, as they believe that perhaps the timing chain has stretched. Since it was an 8+ hour job to do the test and confirm the suspicion I held off. Currently have the car at a smog repair specialist to have another pair of eyes on it. One question I have for you is your EVAP readiness monitor in the INC, or non-ready state? Mine will not go into the ready state no matter what. I really feel its the fuel vent valve as that is really the only correlation between the two items (code and not ready state). Though the fuel tank vent has been tested multiple times and has been working every time, I feel perhaps its intermittent when its gets to a certain temp, or? Im in CA and therefore cannot re-register the car which I need to. Its really a mess.

btw - I only have the P112F code, no others.

[turnstile]

Update: had the shop replace the fuel tank vent and the problem persists. He believes it's an electrical problem (bad wire in one of the harnesses) due to the intermittent nature. He will reset the code, and it will come back immediately. He will then reset it again and it won't come back for several hours. He does it again, and this time it will come back in half an hour.

[pungo]

Fault Code Description
The diagnosis monitors the plausible position of the throttle valve in relation to the applied intake pipe vacuum.
Fault monitoring conditions
The fault is recognised when the monitored mass flow rate rises above a limit value.

Fault Code Conditions
General Conditions Voltage precondition
- Vehicle voltage between 9 V and 16 V
Temperature precondition
- Coolant temperature less than 60 °C
Time precondition
- 10.5 s
Other preconditions
- Engine ON
- Speed dynamics (speed window) greater than 333 rpm
- Load dynamics (load window) greater than 19%
Terminal status
- Terminal 15 on
Terminal Condition

Driving Conditions
Fault Time Condition
The fault is entered immediately.

Service Plan
Check the intake system and crankcase for leaksCheck the throttle valve (dirt, carbon residue, icing)Check the wiring harness between the DME and intake pipe pressure sensorCheck the wiring harness between the electromotive throttle controller and DMERenew the intake pipe pressure sensor

[turnstile]

Originally Posted by pungo

Fault Code Description
The diagnosis monitors the plausible position of the throttle valve in relation to the applied intake pipe vacuum.
Fault monitoring conditions
The fault is recognised when the monitored mass flow rate rises above a limit value.

Fault Code Conditions
General Conditions Voltage precondition
- Vehicle voltage between 9 V and 16 V
Temperature precondition
- Coolant temperature less than 60 °C
Time precondition
- 10.5 s
Other preconditions
- Engine ON
- Speed dynamics (speed window) greater than 333 rpm
- Load dynamics (load window) greater than 19%
Terminal status
- Terminal 15 on
Terminal Condition

Driving Conditions
Fault Time Condition
The fault is entered immediately.

Service Plan
Check the intake system and crankcase for leaksCheck the throttle valve (dirt, carbon residue, icing)Check the wiring harness between the DME and intake pipe pressure sensorCheck the wiring harness between the electromotive throttle controller and DMERenew the intake pipe pressure sensor

Anyone know where to get the pinout of the DME (ECU) for the n55? I really want to test the continuity of the harnesses for the throttle and map as per the above.

[335twins]

Originally Posted by turnstile

Im in the middle of a nightmare with the code P112F. 2012 x3 35i w/ 128,xxx miles. The charge pipe and MAP were replaced about 9 months ago but didn't solve the intermittent problem. Car runs great except for a rough idle. Had it at a good BMW specialist here in LA, and they couldn't find the source after having the car for 3 days. They ruled out any intake leaks (did pressurized smoke tests), carbon build up, fuel line air leaks, valve cover, oxygen sensor stems, etc. The list went on. They want to take apart the top end to do tests on the timing, as they believe that perhaps the timing chain has stretched. Since it was an 8+ hour job to do the test and confirm the suspicion I held off. Currently have the car at a smog repair specialist to have another pair of eyes on it. One question I have for you is your EVAP readiness monitor in the INC, or non-ready state? Mine will not go into the ready state no matter what. I really feel its the fuel vent valve as that is really the only correlation between the two items (code and not ready state). Though the fuel tank vent has been tested multiple times and has been working every time, I feel perhaps its intermittent when its gets to a certain temp, or? Im in CA and therefore cannot re-register the car which I need to. Its really a mess.

btw - I only have the P112F code, no others.

Dang it, this sux, if i replace the MAP and it doesn't solve the problem i be out of $170 ughh.. i kinda of have the rough idle as well, its been like that for a while now, maybe a year or 2..its not too bad, kinda of jumps a bit while stopped..

when you say EVAP rediness monitor in the INC, or non-ready state? how are you checking that? i have carista but not sure how to check this?

Thanks

[turnstile]

Originally Posted by 335twins

Dang it, this sux, if i replace the MAP and it doesn't solve the problem i be out of $170 ughh.. i kinda of have the rough idle as well, its been like that for a while now, maybe a year or 2..its not too bad, kinda of jumps a bit while stopped..

when you say EVAP rediness monitor in the INC, or non-ready state? how are you checking that? i have carista but not sure how to check this?

Thanks

I’ve had the rough idle as well since I bought the car 2 years ago. But the code didn’t start showing up until about a year or so later. Then progressively started coming on more and more often.

With regard to the EVAP monitor, if you go into the OBD2 there is a menu item called IM Readiness or System Readiness. In there you will see all of the monitors and their state. My Autel scanner shows either OK or INC for incomplete.

[335twins]

Originally Posted by turnstile

I’ve had the rough idle as well since I bought the car 2 years ago. But the code didn’t start showing up until about a year or so later. Then progressively started coming on more and more often.

With regard to the EVAP monitor, if you go into the OBD2 there is a menu item called IM Readiness or System Readiness. In there you will see all of the monitors and their state. My Autel scanner shows either OK or INC for incomplete.

Got it, well i would have to have someone check as my scanner doesn't seem to show that, but i will check to verify.

For me i had the car since new, the CEL P112F just showed up like a week ago, the rough idle though been there for like a year or 2..The car drives fine as far as i know..

[turnstile]

Originally Posted by 335twins

For me i had the car since new, the CEL P112F just showed up like a week ago, the rough idle though been there for like a year or 2..The car drives fine as far as i know..

That's exactly how it played out for me, as other than the code the car runs great. So far Ive had the MAP, Charge Pipe, and Tank Vent Valve replaced as well as have the MAF and throttle body cleaned.

One thing you should definitely do is the DME adaptation process (see attached PDF). The shop did it for me, as well as do everything in the test plan, but it didn't seem to do anything. Ive been thinking about doing it again myself since having the vent valve replaced, and throttle body cleaned. The location of the vent valve connector you remove is in the attached image (Item #1). It's to the left of the throttle body. It can be easily accessed w/o doing anything under the hood.

[335twins]

Originally Posted by turnstile

That's exactly how it played out for me, as other than the code the car runs great. So far Ive had the MAP, Charge Pipe, and Tank Vent Valve replaced as well as have the MAF and throttle body cleaned.

One thing you should definitely do is the DME adaptation process (see attached PDF). The shop did it for me, as well as do everything in the test plan, but it didn't seem to do anything. Ive been thinking about doing it again myself since having the vent valve replaced, and throttle body cleaned. The location of the vent valve connector you remove is in the attached image (Item #1). It's to the left of the throttle body. It can be easily accessed w/o doing anything under the hood.

Got it, so basically have the car running at idle, disconnect the valve connector, wait 15 min (that's long idle time) then connect it back in and clear the code..

[turnstile]

Originally Posted by 335twins

Got it, so basically have the car running at idle, disconnect the valve connector, wait 15 min (that's long idle time) then connect it back in and clear the code..

Disconnect prior to starting car. Idle at the very least 15mins. Reconnect while running. Clear codes. Good luck!

[335twins]

Originally Posted by turnstile

Disconnect prior to starting car. Idle at the very least 15mins. Reconnect while running. Clear codes. Good luck!

Got it, thank you. Also, i wanted to bring this up:
I went to see a mechanic that works on my car, we had the car running and were checking on some other noise that i am hearing and it sounds weird, so he had me rev the car multiple times, then he opened the oil cap (the car was running) and closed it, then the car ran for a bit and it died on its own, i was like hmm that's weird, started the car back up and it was fine. Then i drove away, probably 5 min and boom CEL came on, went back to him, he cleared the code and on the way home it came back on again..not sure if opening the Oil cap created the CEL...make me think though...

[turnstile]

UPDATE: I decided to run the adaptation again as per the TSI I posted. I did this yesterday just after I posted here. I figured it couldn't hurt doing again, seeing as the fuel vent had been replaced, as well as the throttle body cleaned. I then cleared the codes, and...no more code. Its gone everywhere including the pending and permanent memories. Ive since done 4 driving cycles, and driven over 120 miles and still no codes have appeared. I'm so happy, as I just passed smog here in CA just a few hours ago. To think I've spent weeks chasing down this problem, and it has finally been resolved.

[N55_X3]

Originally Posted by turnstile

UPDATE: I decided to run the adaptation again as per the TSI I posted. I did this yesterday just after I posted here. I figured it couldn't hurt doing again, seeing as the fuel vent had been replaced, as well as the throttle body cleaned. I then cleared the codes, and...no more code. Its gone everywhere including the pending and permanent memories. Ive since done 4 driving cycles, and driven over 120 miles and still no codes have appeared. I'm so happy, as I just passed smog here in CA just a few hours ago. To think I've spent weeks chasing down this problem, and it has finally been resolved.

Good job! That's the kind of " fixing" that is the more satisfying. When after so long, you just hope it's working and it does...

[turnstile]

Originally Posted by N55_X3

Good job! That's the kind of " fixing" that is the more satisfying. When after so long, you just hope it's working and it does...

So true. It had come down to me getting quotes from Carvana and Carmax to sell it as is with the CEL and code history. Was going to be taking a big loss, but was running out of options. And to think the BMW shop wanted to do a test plan on the timing which was going to be $1000 in labor. They believed the timing chain had stretched or that the DME was bad.

Hoping that the OP runs the adaptation process and has the same results as I.

[arkow]

Originally Posted by turnstile

UPDATE: I decided to run the adaptation again as per the TSI I posted. I did this yesterday just after I posted here. I figured it couldn't hurt doing again, seeing as the fuel vent had been replaced, as well as the throttle body cleaned. I then cleared the codes, and...no more code. Its gone everywhere including the pending and permanent memories. Ive since done 4 driving cycles, and driven over 120 miles and still no codes have appeared. I'm so happy, as I just passed smog here in CA just a few hours ago. To think I've spent weeks chasing down this problem, and it has finally been resolved.

that's good to hear, I need to find someone that can clear my code so I can try what you mentioned, ill update once I do this.

[Papa Smurf]

Hey guys is there any updates to this thread? I am having this same issue for the past few years with the code coming back more frequently lately. Did the adaptation and throttle body cleaning do the trick?

[Looker.]

Also looking for update and help on the rough idle and P112F issue. Has any one successfully resolve this issue?
Thanks!

[Nitolin79]

Also looking for update and help on the rough idle and P112F issue. Has any one successfully resolve this issue?please any one who has solved this issue please comment
Thanks!

[Mingstar88]

same here with P112F, currently at 136000km

once in a while i get Drivetrain Malfunction when accelerating on the highway

no visible crack on the intake pipe
thinking of replacing maf sensor, boost solenoid, valve cover

[Mrchin]

I have this code. But no engine light on. And all other smog checks passed and are ready. Will inspection pass or fail?