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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

CODE 26

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Old 01-02-2014, 11:59 AM
bumper.45acp bumper.45acp is offline
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CODE 26

Pulled this code yesterday KOER...best i can tell it is a MAF code or a TOT code, which my truck has neither. Not sure what it could be. Any ideas? Also got a 34 and a 41 if that makes a difference. Thanks.
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Old 01-02-2014, 12:01 PM
bumper.45acp bumper.45acp is offline
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also there where no KOEO codes.
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Old 01-02-2014, 12:53 PM
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Run the test again. I agree, 26 doesn't seem to be the right thing for your truck. Maybe you have the wrong computer if you are getting this code again?
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Old 01-02-2014, 02:08 PM
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I ran it three times yesterday, because i knew i had to be counting wrong, but i will run it again just to be sure. Would it even run if it did have a MAF computer or computer for an E4OD?
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Old 01-02-2014, 05:25 PM
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Are you positive someone didn't do a MAF swap on your truck? I don't know too much about it, but don't they make kits for this so you can modify the engine?
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Old 01-02-2014, 06:13 PM
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26 is also the code for transmission temperature out of range.... ~Bill
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Old 01-02-2014, 06:35 PM
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Originally Posted by bill06447 View Post
26 is also the code for transmission temperature out of range.... ~Bill
His tranny(the AOD) doesn't have this sensor.
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Old 01-02-2014, 08:10 PM
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According to the 1986 FoMoCo Powertrain Control/Emissions Diagnosis Manual, a KOER Code 26 is not possible for any engine in a Light Truck application that year.

Possible reasons you might see this:

- You're misinterpreting codes or pulling them incorrectly
- Some PO replaced the computer with the wrong one
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Old 01-03-2014, 10:12 AM
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There has not been a MAF swap on the truck (yet). I am 100% sure that I pulled the codes correctly. It is entirely possible that I counted wrong, but I did count the other codes right. I am going to reset the codes and pull them again tomorrow then see what it says. I was pulling codes to see about a fuel mileage issue (4-6 mpg), which I think my EGR codes may be the cause of that. Thanks for the input guys.
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