System Too Lean At Idle P2187
 

I have a 2006 Sonata with about 40,000 miles on it. Recently the check engine light came on, and checking the codes revealed a P2187, System Too Lean At Idle Speed.There were no other codes. I cleaned the MAF sensor. Checked for vacuum leaks as best I could and found none. I also checked the air filter and it is clean. I cleared the code, but the check engine light came back on within a day, revealing the same trouble code.

Does anyone have any suggestions on what else to try? I'm thinking it is probably an oxygen sensor, but which one? I do not have access to an OBDII tool that can do real-time analysis.

RE: System Too Lean At Idle P2187
 

Warranty = 10y/100k miles (5y/60k miles if used)
Your car = 3y/40k miles

Why don't you just take it to the dealer to have it fixed under warranty for free?

RE: System Too Lean At Idle P2187
 

Which engine?

RE: System Too Lean At Idle P2187
 

The engine is the I4. (Sorry about forgetting some obvious information.) I had thought it could be related to ethanol in the gas, in reference to which gas is used. Currently I use 87 octane, and have always used it.

Why not take it to the dealer? In reading over the complex warranty, it was hard to tell under just what area an oxygen sensor would fall (fuel, emissions, engine)? I came to the conclusion that an oxygen sensor was covered under a shorter period of warranty that had already passed, hence my desire to diagnose and repair the problem myself.

RE: System Too Lean At Idle P2187
 

I don't know what you mean by "shorter period of warranty". If you live in the US or Canada, you get 5 years or 60,000 miles if you are NOT the first owner, or 10 years/ 100,000 miles if you are the original owner. Oxygen Sensor clearly falls under the heading of "Powertrain". Take it to the dealer, and just ask them if it's under warranty.


Looks like you're right, it's probably the primary oxygen sensor (the one before the catilytic converter). Be careful cleaning that MAF sensor, they usually don't need cleaning, and it's easy to destroy the element inside.

RE: System Too Lean At Idle P2187
 

Unless you accidental filled up at an E85 pump, I don't think ethanol is the problem. I do not think the O2 sensor is to blame either. The O2 sensor is reading a lean state at idle, which means unmeter air is getting into the engine. I've heard of this happening with cars with a vacuum leak, where the intake manifold was removed and replaced without replacing the gasket or from a leaking flex pipe on the exhaust. I suspect a faulty EGR or purge valve that is stuck open which would tend to show up as a problem only when the engine is idling. I agree that this is a dealer issue where a dynamic monitor of the emmisions system can be used. It should be a warranty repair, but you can always ask first to make sure.

RE: System Too Lean At Idle P2187
 

I agree with Ken, ethanol is not the problem. Trust me, your car is still under warranty. Let the dealer diagnoseand fix it for free.

RE: System Too Lean At Idle P2187
 

Okay. I will schedule an appointment with the dealer and take it in. I'll be sure to post back what the problem was. Thanks for the help/support!

The dealer replaced the intake manifold gasket to resolve the problem.

Very good. Thanks for letting us know what happened.

Ken

Please to confirm part number intake manifold gasket. I will like to look for it and change it. I have the same code on Accent 2006 94000 miles as second owner. Thanks

The part number for the 2006 Sonata 2.4L engine is FelPro MS97116. I just finished changing mine and my P2187 code and rough idle problem is finally solved. I replaced both O2 sensors first - to no avail. My gasket was blown (imploded) right next to intake port #1. This adjacent bolt is tricky to get torqued correctly because it can be difficult to get a torque wrench on it. I used a ratchet with a short extension and just went by the "feel".

If you are going to attempt this job yourself, I advise going to the hmaservice website and looking at the proceedure for removing the intake manifold. They make it sould a little simpler than it actually is. You have to remove the radiator fan (easy) in order to be able to get to the bolts on the hidden bracket that hold the manifold in. There are several wiring plugs, plus a few coolant hoses, vaccum hoses, PVC hose, etc that also have to be removed.
You will need a 10" 3/8 drive ratchet extension to get the 12mm bolts loose that hold the manifold on. Place a few layers of trash bag plastic over the front of the socket (held in place with small rubber band) to keep the bolts/nuts in the socket after initially breaking them loose - else they will fall and you may not be able to recover them.

Your local autoparts store should be able to get you the correct gasket for your 06 Accent. Again, I strongly advise going to hmaservice and looking over the proceedure before attempting the job yourself.

The intake gasket for the 2.4L THETA is not the same as your Accent.

The 2.4 intake gasket is easy.. I like doing them, easy money.

P2187, System too lean at idle Bank I
 

Hi,

I got check engine light today and took it to Autozone. They checked it and it showed P2187. I have 2006 Hyundai Sonata and have 94000 Miles on it.

Reading the thread I would assume this is still covered under 10 yr/100000 mile warrenty. But is there any catch. The car runs fine and doesn't look like there is any vacuum leak or like that.

Any advice??

Thanks..

If you are the original owner then it should still be covered.

My dealer told me to pay $119 for this diagnosis. I had 2006 Sonata GL - I4 model. I went to Auto Parts and scanned the code and got the same P2187 error. Today is 12/21/2011 so 5 year warranty expired but shouldn't my 10 year powertrain warranty cover this type of issue? I don't understand why dealer charge of doing diagnosis on my car.

Same problem but not under the warranty?
 

Hi all, I got the same engine error. I went to my dealer first and they asked me to pay $119 for just engine check-up. I said that I am the original owner but they said that 5yr warranty has expired so I needed to pay in addition to whatever costs it will be afterwards. I bought 2006 SonataGL in April 2006 and now December 2011. What should I do?

Contact Hyundai directly and explain the problem to see what they say. It won't hurt to continue to drive the car this way - it just decreases your fuel economy a little (and makes it idle rough).

If Hyundai says the repair can't be preformed under warranty, then I would seek out a trustworthy independent mechanic to replace the manifold gasket.
The diagnostic fees demanded by the dealer service department are very common. They have huge overhead compared to a small private shop and they have to make up the difference somewhere. Out-of-warranty labor charges are usually higher at the dealership, although in some cases they can find the problem faster with their diagnostic equipment. It's a trade off.
In your case - you know exactly what the problem is and what needs to be done.

Armed with the necessary knowledge and the right tools, replacing this gasket yourself is quite doable.

I have a 2009 Hyundai Sante Fe 3.3.....and I have a P2187 and P2189. I bought it last May, and it has 57,000 miles on it. I believe the used warranty is 3 yrs, and 60,000 miles...does that sound familiar? If so, I've had it less than a year and less that 60 K, so is this the sort of thing that is subject to warranty? I actually bought it at a Dodge Dealership, but I assume I should be able to take it to a Hyundai dealership. Is the best advice to get it to a dealer, make sure it's covered and go from there?

Used warranty is 5 years 60,000 miles. Take it to a dealership to be fixed for free.

replaced under warranty
 

2006 Sonata 2.4L with 43,000 miles replaced intake manifold under warranty