Just put new heads on my truck now first fire up its throwing this code I had a hard time remembering where the grounds went when I put it back together so I'm not sure if that'd cause it. It's idling high also. Could it be a vacuum leak? It wasn't throwing this code before and yes I searched before posting couldn't find **** on where the grounds went or on this problem thank you

 

It's a 2001 1500 5.2l

 

http://www.obd-codes.com/p0505

The iac is on the black of the throttle body. Is it plugged in? Was it removed from the tb? Wires pinched? Etc.

 

I had the same code after doing my heater core.
Somehow I managed to unplug the IAC motor when I was reinstalling the hoses.
Mine would idle low though, it was starving for air.

 

Yup it was unplugged pretty dumb of me haha oh well thanks guys truck runs like a champ still slow though these 5.2 are gutlessss I always thought it was my heads making it slow but nope they just suck haha

 

If it is gutless, you have something wrong....