Econoline E550 V8-7.3L DSL Turbo VIN F (2002)
Oil Temperature Sensor For ECM: Description and Operation
Engine Oil Temperature Sensor
The Engine Oil Temperature sensor is a thermistor mounted to the oil reservoir whose resistance decreases as engine oil temperature increases. The
Engine Oil Temperature signal is used by the PCM to calculate fuel quantity, injection timing, glow plug operation and exhaust back-pressure.
At low ambient air temperatures, and oil temperature below 50°C (122°F), low idle is increased to a maximum of 1300 rpm to increase engine
warm-up. Fuel quantity and timing is controlled throughout the total operating range to provide adequate torque and power.
An Engine Oil Temperature signal detected out of range, high or low, by the PCM will cause the PCM to assume an engine oil temperature of 20°C
(68°F) for starting purposes and 100°C (212°F) for operating purposes. The Malfunction Indicator Lamp in the instrument cluster will be illuminated
as long as the fault condition exists.
