1999 Ford Expedition Q&A
1999 Ford Expedition Question: where is the ect sensor located
What are the trouble codes in the PCM? - backyard tech
PCM is the powertrain control module, which is the main computer for the fuel and ignition systems. The ECT sensor is under the intake hose where it connects to the throttle body. I'm also curious as to what code you have. - lawrenceg
I got a P0171 Reading when it was tested.