coolant temperature sensor
 

:thumbsup: hi can anyone tell me where to locate the coolant temperature sensor on my 2001 harley f150 5.4 w/o supercharge.thanks darren

It doesn't have one. It uses the CHT (cylinder head temp sensor) for engine management & the gauge.

The CHT is screwed into the front inboard surface of the L head, behind the alternator under the thermostat.

coolant sensor
 

thanks for the email.i had the truck on diagnostics today and the coolant reading went from 40 c to 198 c and then back down to 80 c and then up to over 200 c.so im wondering if the temperature sensor is faulty.thanks daren

I didn't e-mail you.

Even a bad sensor can't do that. That could only be caused by an intermittent connection somewhere in the circuit. Is the gauge bouncing?

sorry
 

must of got mixed up .no the gauge is not bouncing.thanks darren.i have codes po171 po174 lean on both banks .i have no air leaks,but the truck will stall once or twice every 3 to 6 weeks.i had the data checked and the coolant temp was fluctuating from 40c to 200c and then down to a - reading.thought the coolant switch maybe faulty.thanks for reading this .darren:rocker:

I'd test the ACT & CHT with a multimeter, and check for exhaust leaks.

https://www.supermotors.net/getfile/...nsorvalues.jpg . https://www.supermotors.net/getfile/...nsor-graph.jpg