The DPFE sensor is a totally separate sensor. Look for the feed pipe to the EGR valve and follow it towards the exhaust. Somewhere along that line you will see two small pipes leading to hoses, that lead to the sensor.
right above the oil filter on the transmission side of the filter mount
IT IS LOCATED ON THE MANIFOLD. JOSE
I have an Impala, and the sensor is located on the top of the dash, near the defroster vent opening. (for the windshield)
You don't have one. The fan is controlled by the PCM. It gets its information from the A/C pressure switch and a sensor right behind the thermostat. The temperature guage gets it's reading the same way, so if the guage is reading ok, the sensor is good.