Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD1999F 150 4WD PICKUP V6-4.2L VIN 2REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSENGINE TEMPERATURE SENSORLOCATIONS
1999 Ford F 150 4WD Pickup V6-4.2L VIN 2
Engine Temperature Sensor: Locations
1999 Ford F 150 4WD Pickup V6-4.2L VIN 2SECTION Locations
Cylinder Head Temperature Sensor (CHT)
Diagram 151-1:
AllData Editor's Note:
"Ford provides conflicting information regarding usage of a coolant temperature sensor for this vehicle/engine. While service and repair information indicates use of a coolant temperature sensor, the diagnostic procedures and wiring diagrams indicate a coolant temperature sensor is not used on this model/engine combination."
From the Powertrain Control/Emissions Diagnosis OBDII Manual:
On applications that do not use a ECT sensor, the CHT sensor is used to determine the engine coolant temperature in place of the ECT sensor. In this case the PCM may store both CHT and ECT Diagnostic Trouble Codes (DTCs). To cover the entire temperature range of both the CHT and ECT sensors, the PCM has a dual switching resistor circuit on the CHT input.
For trouble code and pinpoint related testing refer to: "Powertrain Management : Computers and Control Systems : Testing and Inspection" Testing and Inspection
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.