If someone could tell me what these are and if thet are bad that would be great. 1-PO475
2-PO720 oss sensor circuit fault
3-PO603
My overdrive light started flashing at me yesterday while plowing but it still shifted just fine. It started doing it after i put a aburn limited slip rear end in last summer, it only flashes when plowing or when the roads are really slushy. Also have a dptuner.

 

Could the po475 be from me unhooking the ebpv electrical conector?

 

Yes the 475 will come up if you unplug the ebpv solenoid. The Oss sensor is on top of the transmission. You may just need to clean it. Never dealt with it. Here is pic of it out of Chris's Album. https://www.ford-trucks.com/user_gal...182600&width=0

 

Yea, I'd take the sensor out and try cleaning it, or just replace it. Seems like they're around $30 at Napa. You might also check out the VSS on the rear diff. If your issue started after some rear end work last year, I'd pull the VSS and see if the magnet isn't covered in gunk or something. Clean it up and see if that helps.

The other codes seem common with a DP Tuner. You might try cleaning the EBP tube to see if that helps the 0475. The 0603 just means you have a chip installed. It will always be there.