i have a 2003 king ranch 5.4L that has low temp. Coolant light illuminates, AC refuses to run cold air (because of the sensor) Dealers sold me a Engine coolant temp sensor. The only sensor i was able to find was the head temp sensor.(which i replaced..and now the gauge doesn't move at all) There seems to be an issue on whether my particular engine has an ECT or only uses the HTS. Dealer also gave me a schematic showing me where "ITS SUPPOSE TO BE" which is on the passenger side on the intake near the crossover tube. Well, believe me when i say it ain't there. Any info would be greatly appreciated. thanks

 

Welcome!