Chackett
LVC Member
All-
I feel like this is a long-shot, but going to give it a go anyway.
I have a 2012 Lincoln Navigator with the Ford 5.4l 3v engine. I had let a friend borrow it for a while, and now that I have it back there are some issues. Dead battery, AC Compressor Clutch not working, temp gague in instrument cluster not working, the temperature icon is illuminated on the dash. There were various codes, but most interesting was P1289 - Cylinder Head Temperature Sensor "A" Circuit High.
As usual, I just threw some parts at it and replaced the battery, the thermostat, and the cylinder head temp sensor. Problem persists
When I clear the code via ForScan, the temp gauge will briefly spring to life and appears to accurately show a normal / expected temperature, but within 3-5 seconds, it will throw the code again, the temp gauge dies, and the auxaillary fans kick on (as if it believes the engine is hotter than it is).
Any ideas? I'm doubtful that my new cylinder head temp sensor is bad. The fact that when I clear the code, the gauge briefly comes to life, makes me feel like the actual gauge is functioning properly. Am I hunting down a short now? Ugg..
I really don't want to have to pull the intake to get at that cylinder head temp sensor. I was able to use a 19mm flex head gear wrench to swap the sensor without removing the intake. Thoughts?
Chris
I feel like this is a long-shot, but going to give it a go anyway.
I have a 2012 Lincoln Navigator with the Ford 5.4l 3v engine. I had let a friend borrow it for a while, and now that I have it back there are some issues. Dead battery, AC Compressor Clutch not working, temp gague in instrument cluster not working, the temperature icon is illuminated on the dash. There were various codes, but most interesting was P1289 - Cylinder Head Temperature Sensor "A" Circuit High.
As usual, I just threw some parts at it and replaced the battery, the thermostat, and the cylinder head temp sensor. Problem persists
When I clear the code via ForScan, the temp gauge will briefly spring to life and appears to accurately show a normal / expected temperature, but within 3-5 seconds, it will throw the code again, the temp gauge dies, and the auxaillary fans kick on (as if it believes the engine is hotter than it is).
Any ideas? I'm doubtful that my new cylinder head temp sensor is bad. The fact that when I clear the code, the gauge briefly comes to life, makes me feel like the actual gauge is functioning properly. Am I hunting down a short now? Ugg..
I really don't want to have to pull the intake to get at that cylinder head temp sensor. I was able to use a 19mm flex head gear wrench to swap the sensor without removing the intake. Thoughts?
Chris