Check engine light, code P2006

Tiny
WOODSTOCK69
  • MEMBER
  • 2010 HYUNDAI TUCSON
  • 2.4L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 121,500 MILES
Car runs great, always has. I have owned it for the last 83,000 miles (8 years). Always change oil/filter regularly, no issues.
Last week I changed the air filter and took it in for scheduled oil change. They said it has a check engine light on which it has never had. I said that is strange but got the oil changed and took it to AutoZone to get it checked out. Their scanner showed a code P2006 with the suggestion of replacing the IMRC actuator.

I am a retired aircraft mechanic so I have been swinging wrenches for many years so I started researching what could have happened.

I pulled off the vacuum control actuator on the passenger side that controls the intake swirl tube and tested the solenoid and it clicks when adding 12 volts so then I attached a blown up balloon to the one vacuum tube and activated the solenoid and the balloon started to deflate so it appears the seal is holding properly and it is opening and closing as designed. The swirl tube easily rotates with no apparent hangups.

Next I pulled off the wiring plug on the opposite actuator electric actuator on the driver's side.I applied power and ground to pins 4 and 5 and watched the coupler rotate in one direction so I reversed the polarity on pins 4 and 5 and watched the coupler rotate in the other direction. It does not appear to be broken from what I can tell.

So next I mounted a small inspection camera to watch that coupling while I drove and I cannot see it moving at all from idle to 6000 rpms under driving conditions. Down the road (yeah I had my grandson watching the screen while I was driving).

So I am convinced that the ECM has losts its mind and this all has to do with that air filter change. The mass is not close enough to the air filter box to have gotten any debris in it while I changed the filter.

I have disconnected the battery twice and let it sit to kill the code. When I first start it and drive, the light is out but as soon as I shut off the engine and restart it the check engine light is back on. If it wasn't for the light I would never know that there were any issues with the car, it just runs so great.

I have a couple of other things to try yet but wanted to get some more ideas here. I know I can take it to a dealer and pay them $100.00 to hook it to their $7,000.00 scanner and maybe get the right answer. Thanks
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Wednesday, July 7th, 2021 AT 8:01 AM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 107,615 POSTS
Hi,

It sounds as though you are very knowledgeable. I noted that you applied power to check for operation. Did you check the wiring to the component to see if it was present? If not, take a look through the attached pics below. They are the diagnostics for the wiring. I have a feeling something was disconnected. It sounds like it is working properly, so that's why I'm thinking wiring.

Take a look through these and let me know if you are comfortable performing them.

Take care,

Joe

See pics below.
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Wednesday, July 7th, 2021 AT 9:48 PM
Tiny
WOODSTOCK69
  • MEMBER
  • 2 POSTS
Hi Joe,

Thanks for replying and providing additional test options. I ran the wiring as depicted and everything looks good with no open wiring. I wish I had that service manual, so what does it say next?

Jeff
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Saturday, July 10th, 2021 AT 11:45 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 107,615 POSTS
Hi Jeff,

The manual is from Alldata. It's an online manual that people can get. There are two really popular ones, Alldata and Prodemand. Both are excellent.

Now, if the wiring is all good and you hear the flap moving in the intake, the next procedure is going to suggest removing and inspecting. I attached the directions below. Let me know what you find or if you have other questions.

Take care and I'll watch for your findings.

Joe

See pics below.
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Saturday, July 10th, 2021 AT 8:58 PM

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