On a 1998 Ford F-150 with a 4.2-liter engine, the water temperature sensor is typically located near the thermostat housing. It is usually situated on the engine block or cylinder head, connected to the cooling system. To access it, you may need to remove some engine covers or components for better visibility and reach. Always consult a repair manual for specific guidance related to your vehicle.
The 1999 F150 4.2 does not have a temperature sensor. It uses a cylinder head temperature sensor instead. It is mounted at the rear of the engine on the head.
where is the CHT sensor on a 2000 ford F150 where is the CHT sensor on a 2000 ford F150
The temperature gauge sensor on the 2002 F150 is located on the driver's side of the vehicle and under the intake. This is almost impossible to remove without removing the intake itself.
An auto xray scanner can determine if a O2 sensor is bad.
it's on the intake manifold.
Drop the transmission fluid pan. its there.
The temperature gauge should be connected to the transmission temperature sensor. The transmission temperature sensor is located on the right-hand side of the transmission.
We had the same problem, and our 1998 F150 needed a new instrument cluster.
The sensor can be checked for resistance with an ohm meter. The sensor can be checked while cold then hot for resistance change.
One the engine block on the 302 and 351's
The sensor on a 1998 Ford F150 4x2 is on the rear differential. The 1998 was rear wheel ABS only so don't bother looking for any front sensors.
check the ECT sensor with a scan tool