Stock Problems/Issues Discussions related to warranty related issues and repairs, or other problems with the OEM parts and software for MINI Cooper (R50), Cabrio (R52), and Cooper S (R53) MINIs.

R52 MCS p1125 and p1126 code

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Old Feb 8, 2022 | 10:00 AM
  #1  
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N0Name1991
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R52 MCS p1125 and p1126 code

So the story is that I was going 110mph down the highway then slowed to 90mph. I then got back up to 110 then hit the brakes and the ses light and eml light both came on. My car got sent to limp mode so I pulled into a parking lot turned it on and off got home and parked it overnight. I then drove it this morning and it drive just fine only had the ses light on. Got to work and it went back into limp mode and now won't go over 10mph. The car sounds cammed or like it's misfiring and has a rough idle. What do you think the issue is? I've looked around and read about the throttle body and wiring harness causing these codes do you guys think this is the issue. The codes when I looked them up on all data said there was an issue with the throttle body causing an 18% or more difference between the two sensors for the pedal or throttle body.

I have a video of the light coming on if that is helpful to diagnosing it.
 
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Old Feb 11, 2022 | 05:11 PM
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ssoliman
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Guess: harmonic balancer aka dampener

common on these cars. Replace with ata unit. Think that’s the name of it

Note: I didn’t even search those codes and I don’t know what they mean of the top of my head
 
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Old Feb 17, 2022 | 01:10 PM
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This sounds quite similar to what I'm experiencing in my R52.

Do you have any strange gauge/HVAC/audio symptoms? EP or EML light?
 
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Old Feb 17, 2022 | 05:07 PM
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Eml light. Then eventually limp mode
 
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Old Apr 8, 2022 | 10:13 AM
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Fix

I went and took it to a trusted mechanic after taking it previously to a new shop and the air filter was black and was the cause of the problem. The mini dealership and the shop I went to both said the filter was fine when I took it in but they never checked it.
 
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Old Apr 8, 2022 | 10:17 AM
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Woah, that's crazy! I'm surprised that one; no one else had checked it, and two; the air filter caused this! Makes sense but damn must have been really dirty! I was about to go check mine, but my R52 was used for intake development and the filter is brand new lol
 
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