overdrive light flashes right as it starts up

[rustygold]

this all started when I was driving into town od light was flashing tested the tps and pull codes and I clearned the codes and came back as soon as I started the truck

 

[david85]

What codes did you pull? How did you test the TPS? What was the voltage at idle (make sure cold idle is off) and what was it at WOT?

 

[rustygold]

.8 to .9 to WOT 3.8 then I took it off and did a ohm it starTed at infinite the when to 10 slow drop to 6 as I went to WOT the number got smaller the jumps back up to 10 then infinite again at beyond WOT

 

[david85]

Doesn't sound right. Resistance shouldn't change direction as you move through the span. One end should be low resistance, and it should smoothly change to high resistance at the other end.

What codes did you pull?

 

[rustygold]

I tried got the normal 23 but also got 43. it was like 23.23.1.43.43 on the reader but it.was hard to do the full throttle and watch the reader.

 

[david85]

Try adjusting the idle voltage up a little. Say, 1.0~1.1V. Also, when its in the truck with the ignition on, and the engine off, measure the voltage as you slowly go from idle to wide open throttle. The voltage should sweep up smoothly without any sudden jumps or dead spots.

 

[rustygold]

Got the codes still 23 and 43 but now 26. Started it up this morning no od light flashing so I'm thinking it's overheating or TS in the tranny is going bad

 

[FORDF250HDXLT]

oh you've got 2 threads going.i didn't see this one.the 40 series of codes are egr type codes so i dunno what's going on there.26 is tot sensor out of range.
what scanner are you using?

 

[rustygold]

It's from advanced I tried the test light on it all I got was a steady glow. I'm one who dont preach it's the computer but idk I'll have to have more data to condemn the computer. they way it look like so far it olNY did it to me once and that was yesterday today shifted into gear fine like it has been for 6 months, but I was reading if they sit to long in a spot the transmission does wired things. It sat for two years before I got it.

 

[rustygold]

Ok I think it's the TOT because it get hot the it mess up