P2187 System Too Lean At Idle

[Speedpro1]

I have got a 2009 with the 3.8V6 The engine light came on and when I connect it to my code reader it shows:
P2187 System Too Lean At Idle Bank 1

Anyone have any ideas what would cause this?

Thanks in advance!
Steve

 

[motleyV8]

Any mods to the car or recent service done on it? How many miles?

I would guess 02 sensors, intake leak, or maybe a vacuum/PCV leak.

If it is a fueling issue, perhaps a faulty injector, pump/filter causing low pressure/flow, or EVAP canister issue.

Could be tricky to track down without the correct equipment. I would make sure my air box is is fastened down correctly and then clear the code and see how fast it comes back. If it is always affecting the one bank, that may be a clue on where to look. Perhaps the service manual has a troubleshooting section for this that might help.

Good luck.