Dtc code P0506 Idle air control, RPM lower than expected. Anyone know what this means or how to fix it? Thanks

 

Idle air control valve controls your rpms at idle. Sounds like yours is bad and causing your rpms to drop too much at idle. IAC is attached to throttle body. I think I read somewhere that in our trucks the entire throttle body has to be replaced but research first cause I'm not 100% on that.

 

I would try a good cleaning first...with an approved TB cleaner

 

Well I just installed an SCT tuner and it didn't happen until then. Nothing seems wrong with the truck, as a matter of fact it sounds better. Before the tuner I would hear the PS pump whining. The tuner allows me to adjust my idle rpm. Maybe I should try that?

 

You should of mentioned that in your inital post.....

 

Maybe so, but I still wanted verification of what exactly it meant.

 

It means it's either dirty or going bad...don't think it has anything to do with your new tuner.

 

Hmm, I have 133k miles in it, the first 100k were on dirt and gravel roads daily. I'll probably just take it and get it checked out. Do you think a throttle body spacer would do any good after I fixed the problem?

 

No. Throttle body spacer is a waste of money but makes a great beer holder.

 

No...and it's not very hard at all to clean it yourself....