How do I locate the CHT Sensor on my 4.6 2007 f150 the motor over heated (leak on intake under therm. Housing repaired ) now I'm getting a P128A code cylinder head temp. Sensor circuit intermittent erratic thanks for any help.

 

Dont know if you found already but I just changed mine. You have to take the intake tube off then remove the alternator. Its on the driver side head. I bent a wrench because the angle was so bad.

 

thanks found it.

 

http://www.troublecodes.net/pcodes/p0017/

Read this and it will help you understand how the system works. This isn't specific for the EB just a general knowledge article.