I have a 1996 E350 7.3 with a E4OD trans with a blinking overdrive light. I had the codes pulled and I'll list them below. Van has 189,000 on it and when I bought it I drove it 3 hours home and the trans felt great. It ended up having a number of motor issues and sat without starting for a year. The motor issues are resolved to the point it runs ok but now the trans is in limp mode with the blinking light. Van hauls *** in reverse but not so much in drive. What happened while it sat, could it have locked up? Any help or ideas would be greatly appreciated. Thanks, here are the codes that were pulled

P1280 icp circuit out of range ckt

P0713 trans fluid sensor high input

P0603 internal ctrl module kam error

P0478 exhaust ctrl valve high

P0470 exhaust sensor circuit fault

P0708 trans range sensor circuit high input

 

You really should fix the engine codes before attempting to fix the trans. The TRS is showing an error. It is the sensor on the side of the trans. Either the sensor is bad or you have a bad wire to the sensor.