Help Code 0174/0172

[red101]

Last year I replaces my upper intake manifold and that took care of my 0174 and 0172 codes. Now it is back again. I checked under my truck and saw that there was a leak (more of a drip) (water) where the muffler tube and the catalytic converter tube meet. There is a o2 sensor close by could that be the issue.

Thanks

 

[rickybobby]

The water dripping there is from a minor gasket leak and normal condensation from the engine running. those codes almost always mean a vacuum leak or a leak in the air duct between the MAF and throttle body