I had same issue..replaced TB...code cleared for a bit but came back...will follow this with interest..2009 EX...243000 miles

 

First thing I would do is check the air intake for any cracks or breaks. If the air intake is fine then check for a vacuum hose leak. If you find no leak then check and clean the throttle body.

It could also be a throttle body gasket that needs replacing.

 

You might have a vacuum leak, or something not quite clean or right with the TB cleaning, so witch hunt those. Otherwise, with Honda's it might need an idle relearn, which involves idling for like 6 hrs (I exaggerate) with all the accessories off, then A/C on, then headlights, then in drive. @Slvr7 or @Nail Grease probably have the procedure memorized.

 

Needs a throttle reset after cleaning. I use my OBD II scanner with service functions to do it. I've never tried any other way as others have suggested.

 

Just out of curiosity, was it a Honda specific scanner or just an OBD scanner with idle relearn capability?

 

The salient points; it has to be fully up to temp, where the radiator fan has cycled a few times. It has to sit at idle for 5 min with absolutely no load.

 

Had same issue for a week after tb cleaning. Found a tps reset on a f150 forum that worked for me.
turn key to on position but no start
Depress gas pedal slowly till hit floor.
release fast.
turn key off
do this 3 times.
stopped my high idle. Haven’t seen p0507 back but its only been a few hours.
Hope this helps.
Cheers

 

I have a 2011 Pilot EXL

This is the crazy thing: I got the P0507 Code; and my Check the Emissions light comes on, with the VTM-4 Light(goes on and off). I don't have the high throttle, but if I don't get it fixed, I can't drive my Pilot!
I took it to my mechanic, and he replaced the vacuum hose, thought that would do the trick. Seemed like it did, but for only about 100 miles, and then the lights came on all over again!
He doesn't even know what's going on with my Pilot. This is getting scary.

 

Possible Causes…

• Dirty throttle body
• Electric throttle control actuator misadjusted or damaged
• Faulty Electric throttle control actuator
• Intake air leak
• Poor electrical connection to the Intake Air Control (IAC) valve

Sometimes corrosion can form around the throttle plate, causing it to stick. My first step would be to remove intake hose and inspect for debris, grime and/corrosion. Remove throttle body and clean inside and out with new throttle body gasket. Then perform the idle relearn procedure.
Also inspect air intake hose for cracks. Replace if needed.
Clean the Mass Airflow Sensor (MAF)

 

Did they put the oil cap back on? Is the oil cap gasket still in place?

 

You know what? I did not check that, even though I read that it could be an issue. I am checking now and will report back in a few.

If this is it, then you are a genius and I just pissed away several hundred dollars.... not the first time mind you, but usually on bad choices like hookers and blow.

 

I did check that cap. It was seated and the gasket, albeit very hard, is still in place. Thanks for the suggestion.