I have a rebuild 22re, had an exhaust leak and fixed it. Truck runs great, But I get this intermittent code 25 from an apparent lean. I can't figure what it might be I have run seafoam in it. Changed the fuel filter, and the injectors were replaced before the rebuild. I rebuilt it because I sank it in the river and hydrolocked it and bent a connecting rod.

Any thoughts?

 

also I did replace the vacum switch valve on top. All I can figure is that it has to be the o2 sensor finally went capute. My light only comes on after it warms up but the next day it's off. But somedays I can run the truck all day and it still will never come on. I'm clueless until I have the money for an o2 sensor.