Over the past couple of months, I've been dealing with the common P1151 & P1153 codes on my truck. The first time, I cleaned my MAF sensor, then cleared the codes and they stayed away for a while. About a week ago, the same two codes came back and my truck was idling pretty rough as well. My gas mileage was horrific. I searched this site and found many additional "possible fixes" for the problem I was experiencing. Below, is what I did in hope to resolve the issue. So far I've driven 150 miles and the codes have not come back. The truck also idles much smoother and the gas mileage is much better as well.

I got all the parts listed below from my local Ford dealer for $190 and some change.

- replaced plenum gasket.
- replaced upper and lower intake gaskets.
- replaced EGR gasket.
- replaced the PCV hose near the passenger side firewall.
- replaced isolator bolts on the plenum.