I have a 1997 f250. I am getting obd code 124. I replaced the tps and the speedometer is working. my Od light is flashing and shifts erratically. Can anybody tell me what to check next? the truck was hit by lightening. I replaced all the wiring under the hood to the fire wall and all the sensors.ecm & pcm This is the last problem.

 

Do you have a scanner that will read codes on the truck?

OD light flashing means you have a transmission code stored.

 

wow a real ford lightning. Sorry I don't know the answer. My speed sensor went bad causing the trans to shift crazy but the speedo was gong nuts too.