I did a code check this week and got "636". I did the test three independent times, and it kept showing up.

Is this a ghost code?

 

Did you clear the memory each time?
http://www.broncodata.com/tech/codes.htm

 

A 636 is Transmission Oil Temperature out of range. Was it extremely cold when you checked it?

 

My book says that a code 636 is TOT sensor out of test range (transmission oil temperature).

 

>A 636 is Transmission Oil Temperature out of range. Was it
>extremely cold when you checked it?


Well, it has been anywhere from 25 degrees to 60 degrees. It was about 45 degrees when I tested it. I also got a 114 and 116 codes aswell.

Those are ACT/IAT and ECT out of range codes.

I mainly do alot of stop and go driving, and the truck rarely gets to operating temp, and if it does, not for long. Does that cause these codes?

I've gotten the 114 and 116 codes before, but only in the winter.

Never gotten the 636 before. The fluid is clean and full too.


I didn't clear the codes between those three tests, but I did at the end. Since I've not gotten the codes before, I assumed I got my numbers confused.

 

 

hello . just wanted to ask if you could help me figure out these codes i got.KOEO -1-3-3-4-3-3-4 ,this is the order they came using a volt meter.i am having a problem matching them up according to the chart in my haynes repair manual..i had the volt meter set on 2.5 d.c.v and the #'s are according to rhe amount of wseeps made by the volt meter.i have a posting in fuel injection and carburation systems and in the1987-1996 sections . your help is much appriciated. happy new year.

 

Since your truck is a '91, it uses 3-digit DTCs, and the single flash at the beginning isn't part of a code. You got code 334 twice and apparently stopped before the continuous codes could flash out, which probably erased them. If you go to the link in my post above, you'll see the proper procedure for pulling ALL the codes, how to read them, and the full list of code definitions.