P2187 System Too Lean At Idle Bank 1

[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]

Already replied to your other post
http://www.genesisowners.com/hyundai-genesis-forum/showthread.php?t=11414

 

[Speedpro1]

Already replied to your other post
http://www.genesisowners.com/hyundai-genesis-forum/showthread.php?t=11414

I appreciate your reply but I am looking for something more focused in on the problem, possibily from a Hyundai mechanic.

 

[motleyV8]

I appreciate your reply but I am looking for something more focused in on the problem, possibily from a Hyundai mechanic.

Well, you did ask if anyone knew what would cause it Curious, how do you know that my advice is not helpful? The code means your air/fuel ratio is too high at idle. Either unmetered air is entering the intake manifold, or not enough fuel is being injected. Or, neither are true and your O2 sensor is not reporting the ratio correctly. This OBD code is not specific to Hyundai, it is generic. On some cars, a custom intake without a tune will throw this code since it allows more air in than what is reported. Most just clear it and it doesn't come back after the ECU adjusts the fuel trims over time.

 

[Speedpro1]

Well, you did ask if anyone knew what would cause it Curious, how do you know that my advice is not helpful? The code means your air/fuel ratio is too high at idle. Either unmetered air is entering the intake manifold, or not enough fuel is being injected. Or, neither are true and your O2 sensor is not reporting the ratio correctly. This OBD code is not specific to Hyundai, it is generic. On some cars, a custom intake without a tune will throw this code since it allows more air in than what is reported. Most just clear it and it doesn't come back after the ECU adjusts the fuel trims over time.

The car is stock. I cleared the code and it just comes back on. Your answer was all over the board, it might be this or it might be this, some of it would have nothing to do with the problem. I am not knocking you and I appreciate your input. I have built enough cars to have an idea it might be the 02 sensor but want to be able to narrow it down. That's the problem with alot of dealers today, they just keep changing parts till they finally get it right. You need to be able to diagnose the problem to get it right the first time. I agree aftermarket parts can throw everything off.

 

[motleyV8]

The car is stock. I cleared the code and it just comes back on. Your answer was all over the board, it might be this or it might be this, some of it would have nothing to do with the problem. I am not knocking you and I appreciate your input. I have built enough cars to have an idea it might be the 02 sensor but want to be able to narrow it down. That's the problem with alot of dealers today, they just keep changing parts till they finally get it right. You need to be able to diagnose the problem to get it right the first time. I agree aftermarket parts can throw everything off.

Honestly, I wouldn't have replied if I didn't think I could help shed some light on the problem and help to get the thread kicked off. When someone posts, I don't know if you are Mario Andretti, just some novice or somewhere in between. Again, I am just providing a real world answer to your generalized question "what would cause this?". There is not a simple answer to your question because there is not a single cause of the "condition" reported by P2187. It is like asking "My car pulls to the right, what is the one thing I can do that will surely fix it?"

The tech at the dealer will reference the service manual and/or any related TSB's and follow the troubleshooting steps. There is no "easy button" for stuff like this. For your issue at hand, step one may be to check the the O2 sensors to make sure they are plugged in, wires aren't severed, harness isn't corroded, and then have you check the circuit resistance using a multimeter. If the O2 sensors test out, then you move on to step 2 and do an intake pressure test to check for leaks and then on to the next step. Again this is just an example. If you are knowledgeable and have the proper tools, just download the service manual and get started. Otherwise, just take it to a dealer or shop that you trust and have them troubleshoot it for you.

I hear you though and understand your concerns. I have worked on my own cars for the last 25 years, worked in a service station while in college, and rebuilt some modern engines...I have seen a lot of bad things when it comes to trusting others, even so-called professionals, with your vehicle.

 

[gsell]

I had the same issue for a while, and it turned out to be two clogged fuel injectors.

 

[G-435445]

i had this issue in 2009 Hyundai Geneses but code P 2187 comes with other codes indicating lean and gross leak form evap system I checked the evap purge valve it was bad and when i replaced it and cleared the code he car worked fine and passed smog