Code P1135 and P1155

My wife has the car listed above and we had Firestone tell us they wanted $3,000.00 to replace the intake manifold gasket and oil pan gasket as well as 4 engine mounts. Being a DIY guy I took the project replaced everything. Working one side a time I used a floor jack to move it high enough to switch each mount. When I started the car back up it idled at 3,000 rpm with some white smoke for about 5 minutes and settled back down to 500 rpm, all the oil burned off? The car is now showing codes p1135 and p1155. So I went and got a new A/F sensor and replaced the easier to reach one in the front and unhooked the battery to let the computer restart and the code still shows. I was wondering if I messed up a ground somewhere? I can't imagine both going bad at the same time. Looking to sell the car ASAP as my wife is out of the country waiting for a VISA. Any information would be great going to check all fuses tomorrow.