Ok I just threw a p1131 and p1151 codes and my truck has been running a bit strange lately they say the codes are for o2 sensors but I want to get some options before I just change those my truck is a 2000 4x4 111k btw I just cleaned the MAF about 10 minutes ago and the code threw at about 12pm so I was told by O'rilleys to try that. Thanks

 

I'd check to see if you have a vacuum leak or intake manifold gasket leak.