I'm new to the board and have question maybe someone can help me with. My CEL came on and I had the codes pulled, the scanner said both banks were lean. I replaced the PCV hoses because one of them was burnt up. I had hoped this was the problem so I reset the codes, now the same codes have come back. I recently changed all plugs, fuel filter, and air filter, I also ran a can of seafoam through the vacuum line as directed. I have checked for other vacuum leaks and can not find any. Could someone give me something else to look for before I have to take iot to the dealer. Just for info the truck seams to run fine.

 

make sure the fuel filter is installed correct. the flow or the arrow is pointing forward.

 

You might also try cleaning the sensor wires on the MAF sensor located just after the air filter.