"Service Engine Soon" light came on @ 380 miles? WTF?

[Blown347Hatch]

Is this someting commonly seen with these trucks? I tried shutting the truck off and re-starting it, which did not help. I disconnected the battery, which has done the trick (for now). I have a 140 degree thermostat, but I would not think it would cause this because:

1. These (and all vehicles) start up cold every time you get in them.
2. A friend of mine has been running around with his thermostat taken out, and no problems.

Unless the truck is now running a little richer this way, and one of the sensors is picking up on this.

 

[RYAN the GREAT]

140 degree thermostat? HOLEE ***IN SHIT. Thats the problem no doubt.

 

[Blown347Hatch]

Originally posted by RYAN the GREAT
140 degree thermostat? HOLEE ***IN SHIT. Thats the problem no doubt.

What's the stock one? What's the coldest I can get away with?

 

[RYAN the GREAT]

Coldest is 160 max, stock is 190.

 

[Blown347Hatch]

Thanks, I guess I'll be chasing down a 160* now.

 

[LightningForce9]

140* thermostat, where in hell did you find that???

 

[Blown347Hatch]

Originally posted by LightningForce9
140* thermostat, where in hell did you find that???

Marine store. I asked for a Ford thermostat in a 140*, and it fits in there just like a stocker.