This is topic Check Engine Light Code 12 and 26 Help in forum Tech Talk at Northern California Ford Owners  .


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Posted by FivePTSlow (Member # 7682) on :
 
So, today I replaced my Throttle Position Sensor. I made sure it was at a steady .98 volts. Then for some reason right after replacing the TPS I start getting CELs 12 and 26 any idea why that would happen? I didn't touch anything except the TPS.

Code 12 - RPM unable to reach upper test limit
Code 26 - VAF/MAF out of self-test range
 
Posted by Greasy (Member # 5258) on :
 
Did you check the 5V ref on the TPS?

[ November 02, 2011, 06:33 PM: Message edited by: Greasy ]
 
Posted by FivePTSlow (Member # 7682) on :
 
quote:
Originally posted by Greasy:
Did you check the 5V ref on the TPS?
No I didnt I remember on my old tps it read 4.98
 
Posted by Greasy (Member # 5258) on :
 
I would just confirm that the wiring is good by checking the ref voltage. Also when you are back probing the wires to set your TPS bring the throttle wide open and it should be right around your ref voltage.
 
Posted by FivePTSlow (Member # 7682) on :
 
Yup 5v
 
Posted by FivePTSlow (Member # 7682) on :
 
well I cleaned the MAF sensor and did the base idle reset procedure over and so far it seems to have cleared up the problems so far
 




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