2005 Ford F-150

This is my 2005 ford f150 5.4l 4x4 automatic. I had the motor rebuilt around 215000 miles. I’ve put around 10,000 on the motor driving around, it ran fine until something with the electrical management system went bad. The codes it’s throwing are: O2 sensor, lean to rich code. When I rebuilt it, it was resurfaced and cleaned both on the block and heads. The Hydraulic lifters were replaced, springs and valves were inspected and found nothing wrong. The piston heads, rings and bearings were replaced. Oil pump is new. Crankshaft bearing are new. All the gaskets are new. Timing chains are new and the cam phaser gears too. I put new VCT solenoids in. New coil packs and spark plugs. Tranny has been flushed. I don’t want to get rid of it because I’ve had a lot of work done, but I don’t have the time to look into or fix it because of work. It has sat for awhile now and the battery is bad. Doesn’t hold a charge. The price is $2000 as is. If you have any questions feel free to message me.