My check engine light came on and I hooked up a code reader and got P2187
lean idle bank one. Any suggestions? Thanks in advance.

 

P2187 - System To Lean at Idle (Bank 1)

Any other symptoms besides the CEL and this code? How does it idle? I've seen this issue before with BMW's and it related to fueling. You can use this article to check pressure (it's for an R56, but still might be helpful to you) MINI Cooper R56 Fuel Pump Testing (2007-2011) | Pelican Parts DIY Maintenance Article.

 

Car runs great. Milage is outstanding. Sometimes the idle drops a little bit at a stop then comes right back up. Not sure if its a vacuum leak or a sensor thats on the fritz. Going to the shop for an oil change and I'll have them check it out. Thanks
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Bad oil filler cap seal. All fixed now.