bingo46

Is there an easier way to R&R the sensor without taking off the intake manifold? Can it done through the valley? Tricks?


Any help appreciated

JCR 56

Remove the alternator and see if that helps. They sure as hell put it in a weird place.

F150Torqued

@Bingo46
How did you determine the CHT sensor is bad? I can tell you, if it is a 5.4L Triton, that is extreem to casually attempt. It's located between intake ports of cyl 2 & 3 and even removing the Alternator and Water crossover manifold there would not be enough clearance to reach it as the manifold "resonance chamber" fills the entire valley.


Also, numerous engine functions / perameters are dependent on it. You have no coolant temp sensor and Coolant Temp is calculated based upon CHT signal. You can't achieve Closed Loop until coolant temp (calculation) is sufficient, and you'll get a P0125 code - or P0217, and the PCM will go into "limp mode". Also, by monitoring the OBDII signal from the CHT, you can see the ECU do a recalibration procedure on the CHT every run cycle.


This article might help diagnose it: http://www.searchautoparts.com/motor...ure-cht-sensor


I would recommend trying everything else in the book before tackling that. Checking out this link might help: https://www.f150forum.com/f4/temp-gaug-295494/

Good luck