2003 F350 7.3 diesel. Service Engine Soon light came on but my code reader shows no codes and indicates the light is out. I even cleared the codes just to be sure and the light stays on from the moment I start the truck. This one has me stumped. Any suggestions as to what would cause the light to come on with no codes?

 

Update: Broke down and took truck to Ford dealer. Their code reader found codes P1280 and P1211 (0 pressure and 0 volts) which points to the ICP sensor. A new sensor cleared the codes and put the Service Engine Soon light out. Not sure why my generic code reader would not show the codes. A bad ICP senser will trip the SES light immediately which is why clearing the codes did not make the light go out. Ford charged me $215 for the ICP sensor which is a rip since I have seen them on ebay for a lot less. Guess I need a better code reader.

 

My service engine light came on about three days ago and the vehicle runs ruff. At first when I started it was fine, no light but after about a couple miles down the road the light came on and it started running bad. The next couple of days the same thing happened but yesterday the light came on when I started it and it ran bad the whole time. Any suggestions. PS: I do not know if changing the starter a couple of weeks ago could have anything to do with this, I did disconnect the battery but did the reset as shown in my book. I also put new gas in it. Additional note. I received a letter about a week ago from ford telling me that I need to bring the vehicle in because of a recall on the ICP senser, could this be the problem because I just had the motor replaced about 2 years ago and it only has about 40,000 on it. Thanks