I got a CEL P0506 Idle Ctrl Sys Rpm LO Exp. Basically the car was idling lower than the computer was wanting/expecting it to. Say its set at 760 then drops to 600. It seems to do it when i have the defroster on. I don't if its the engine fan kicking on or what. Anyone have this happen to them? I have an early 05 and had the throttle positioning sensor replaced last summer.

Thanks,

Scott

 

Got Cams on the car?

 

No, have not installed cams.