Overheating for a short period of time does not cause sludge/gunk in the oil. That come from YEARS of neglect and/or months of overheating.

Also, if you go to HMAservice.com and you will see that it DOES tell you to check the OCV. The mechanic didn't do his job very well. That is his fault, not Hyundais.

From HMAservice.com:

>ELANTRA(XD) > 2005 > ENGINE > Engine Control > Fuel System > Troubleshooting > P0011 > Component Inspection

COMPONENT INSPECTION
INTAKE VALVE CONTROL SOLENOID OPERATION CHECK
[With Scan Tool]
1.Ignition "ON" & Engine "OFF"
2.Install scantool and select "CVVT VALVE" on the Actuation Test mode
3.Activates "CVVT VALVE" by pressing "STRT(F1)" key(should hear a faint click from intake valve control solenoid)
4.Repeat this procedure 4 or 5 times to ensure intake valve control solenoid reliability

[Without Scan Tool]
1.Ignition "OFF".
2.Remove the intake valve control solenoid from the engine.
3.Visually check the Spool Column of intake valve control solenoid for contamination.
4.Connect 12V and a ground to 2 and 1 of the solenoid(Component side). Verify that spool column move to left as shown in the figure.
5.Disconnect 12V and verify that spool column move to original condition.
http://www.hmaservice.com/data/PASSE...NG/p0011-3.gif
6.Has a problem been found?
http://www.hmaservice.com/data/PASSE...ES-ENG/yes.gif
▶ Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure
http://www.hmaservice.com/data/PASSE...GES-ENG/no.gif
▶ Go to next step as below

CHECK INTAKE VALVE CONTROL SOLENOID RESISTANCE
1.Ignition "OFF".
2.Disconnect intake valve control solenoid connector.
3.Measure resistance between terminals 1 and 2 of the intake valve control solenoid connector.(Component side)
Specification
Injector
Normal Parameter At 20°C (68°F)
Coil Resistance
6.7 ~ 7.9Ω
Insulation Resistance
Above 50MΩ

http://www.hmaservice.com/data/PASSE...NG/p0011-4.gif
4.Is resistance within the specification?
http://www.hmaservice.com/data/PASSE...ES-ENG/yes.gif
▶ Go to next step as below
http://www.hmaservice.com/data/PASSE...GES-ENG/no.gif
▶ Replace the intake valve control solenoid and go to "Verification of Vehicle Repair" procedure

CHECK THE SUSPECTED AREA
1.Check the following items
A.Intake valve control solenoid filter for sticking or contamination
B.Engine oil and it’s level
C.Engine oil filter
2.Is there any problem?
http://www.hmaservice.com/data/PASSE...ES-ENG/yes.gif
▶ Repair or replace the intake valve control solenoid and go to "Verification of Vehicle Repair" procedure
http://www.hmaservice.com/data/PASSE...GES-ENG/no.gif
▶ Go to "Terminal and Connector Inspection" procedure



Also see this TSB:
http://www.novaresource.org/Tucson/09-em-002.pdf

My wife had complained the a/c was turning off for a few weeks. I was driving it over to check the a/c when it overheated. The thermostat had to be replaced. After that the a/c worked fine. I am sure it had beed running hot. When I was working on it after it overheated I found the oil gunked up.

I do not see the oil control valve filter on the list of things to check. It does not take anything but a wrench to take it out and your eye to look at it. If you do not want to clean it it is only $10.40 plus sales tax. But I cleaned the old one with brake cleaner and hot water. Then the code cleared. The OCV or CVVT was not working. I would think that something so simple should be on the list to check.

I also do not see why my state will not let my car pass inspection because of the check engine light. If the car runs fine and the emissions are in line then it should pass. It seems like a great way to force people to pay to fix a car that is not broke. The hyundai seems like a good car. It is fairly simple. But when I told the mechanic about the OCV filter he did not know it was there. I showed it to him so now he does.

Sorry but if the CEL is on, something IS wrong. If nothing was wrong, the CEL wouldn't be on and it would have passed.

You should want fix your car if the CEL is on. Your state shouldn't have to force you to do it. Maybe that's why you let it overheat for so long. If you had maintained your car better, you would have seen the overheating condition sooner and not have cooked your oil and clogged the OCV. Like I said before:

I don't know if it's my computer, but I can't see the images when I click on them. I am a member of another forum and don't have an issue seeing photos. Anyway, I thought I would post a photo in case someone in the future looks up this trouble code (P0011) and wants to know where the OCV filter is. Here it is in this photo (the red arrow is pointing to the 14 mm bolt head):

Attachment 1610

Thanks to NovaResource who personally described to me where I could find this. :)

Ocv
Having the same problem

Change the oil first and replace the OCV filter and clear the code with a scanner. See the photo in post #14. Get a 14mm socket and remove that bolt head. There will be a plastic and mesh screen cone-shaped filter attached to the bolt. Pull it off and pop a new one on there and reinsert the bolt with the new filter. It's torqued to 30-37 ft. lbs. The filter screen only costs $8-$11. You can also try cleaning it with brake cleaner. Get the straw for the brake cleaner to force spray the cleaner through the screen to clean it out. I would just replace it.

In the diagram below, "A" points to the bolt head. The yellow arrow points to the cone-shaped screen filter. Instructions say to use a new gasket/washer on the bolt and to keep the OCV filter clean.

Attachment 2219

For others reading this thread, I highly recommend you use a HYUNDAI brand thermostat for the cooling system. Thermostats are one of those car parts that just need the OE part. This is regardless of make (Hyundai, Mazda, Ford, Toyota, GM, VW, etc.). Make sure to use a Phosphated HOAT coolant in the system and never introduce tap water into the system, only distilled or deionized water. Use a Hyundai radiator cap, not an aftermarket cap. Keep the cooling system maintained and do regular oil/filter changes to avoid OCV problems.