F 350 4WD Super Duty V8-6.4L DSL Turbo (2008)
Oil Temperature Sensor For ECM: Description and Operation
ENGINE OIL TEMPERATURE (EOT) SENSOR
Engine Oil Temperature (EOT) Sensor
The EOT sensor is a thermistor whose resistance decreases as engine oil temperature increases. The EOT signal is used by the PCM to calculate fuel
quantity and injection timing.
At low ambient air temperatures and an oil temperature of less than 70°C (158°F), low idle is increased to maintain stable idle quality. Fuel quantity and
timing is controlled throughout the total operating range to provide adequate torque and power.
An EOT signal detected out of range, high or low, by the PCM causes the PCM to substitute a temperature based on the ECT to be used for operating
purposes.
