Code 35 - Iac Error

My 93 K1500 Is Pulling Code 35 - Iac Error. I Replaced The Iac Last Year So Im Not Sure If The Valve Is Bad Or If Something Else Could Be Throwing This Code. The Truck Is Also Throwing Code 44 (o2 Sensor Lean). My Truck Is Running Very Rich And Only Getting About 8 Mpg So I Think The Ecm Is In Limp Mode.

I Need Advice!!
Thanks

Change the o2 sensor. Clear the codes and recheck.