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Codes P2774, P0100, P10f5, P00bc, P0172 intake vacuum leak?

Tiny
BHAMDOC1973
  • MEMBER
  • 2013 BMW X1
  • 4 CYL
  • TURBO
  • 4WD
  • AUTOMATIC
  • 93,000 MILES
Sometimes it just stays running smooth, other times it just hiccups while in park like you see in the 1st video where the RPMs drop and come back and that's it. I put a new battery and just drove it and came up with this code P2774 air mass, plausibility: air mass too high (not present) but check engine light is on. It can also be called p00BD mass or volume air flow "A" circuit range performance-air flow too high
Under permanent codes which I think some were there from before I replaced the battery because there were so many codes then are:
P0100
P10f5
P00bc
P0172
When I first try to floor the gas pedal the RPMs dropped so I don't get the full normal throttle. The 2nd video shows that.
Also, I drive it around twice, if I stop and am still in gear it will stumble. I can turn it back on and if it stays in park it will not die but will hiccup.
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Friday, August 26th, 2022 AT 4:03 PM

12 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,887 POSTS
Thanks for the videos, this sounds like you have a vacuum leak which I have heard these cars can crack the valve cover, also I would service the throttle body, this would account for the P2774 code. I would also get some MAF cleaner to service that is well, check for a vacuum leak when the engine is cold only, and then go over these guides to help us find the problem.

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

and

https://www.2carpros.com/articles/throttle-actuator-service

and

https://www.2carpros.com/articles/mass-air-flow-service

Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.
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Saturday, August 27th, 2022 AT 10:10 AM
Tiny
BHAMDOC1973
  • MEMBER
  • 1,290 POSTS
Sprayed everywhere, nothing changed. Clean MAF nothing, throttle body super clean.
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Saturday, August 27th, 2022 AT 11:17 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,887 POSTS
It looks like you have a problem with the wiring for the MAF sensor or the connector is having problems. Here is a guide to help you test the connections and the MAF wiring diagrams to help with the test. Also, cleaning the sensor will not work if the sensor is bad. so, I would try a new sensor first.

https://www.2carpros.com/articles/how-to-check-wiring

Please let us know what happens.
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Sunday, August 28th, 2022 AT 6:50 PM
Tiny
BHAMDOC1973
  • MEMBER
  • 1,290 POSTS
Here are some numbers when cold.
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Monday, August 29th, 2022 AT 2:07 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,887 POSTS
I can't see the numbers because the phone needs to be on landscape position.
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Tuesday, August 30th, 2022 AT 12:17 PM
Tiny
BHAMDOC1973
  • MEMBER
  • 1,290 POSTS
I watched it on my phone sideways, no issues.
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Tuesday, August 30th, 2022 AT 1:43 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,887 POSTS
Thanks for the reload, I'm on desktop. With all these codes I would say the DME is bad. Here is how you can replace it.
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Wednesday, August 31st, 2022 AT 11:44 AM
Tiny
BHAMDOC1973
  • MEMBER
  • 1,290 POSTS
I found this leak, just not sure what can be causing it, looks like it's a bot broken but not sure if it's the whole thing on bottom, isn't this the air cooler?
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Friday, September 2nd, 2022 AT 8:31 AM
Tiny
BHAMDOC1973
  • MEMBER
  • 1,290 POSTS
Via smoke test. Thats got to be it.
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Friday, September 2nd, 2022 AT 8:34 AM
Tiny
KEN L
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Yep, you found it nice work. ;) When you get it apart can you please unload images of the broken part/damage?
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Saturday, September 3rd, 2022 AT 8:48 AM
Tiny
BHAMDOC1973
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  • 1,290 POSTS
Cracked.
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Saturday, September 3rd, 2022 AT 9:33 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,887 POSTS
Nice work, we are here to help, please use 2CarPros anytime.
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Saturday, September 3rd, 2022 AT 12:00 PM

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