N20 and N26 Differential Pressure Sensor Fault 195002 Stored in DME. The Service Engine Soon (MIL) light is on with the following differential pressure sensor fault stored: ? 195002 - Differential pressure sensor, tank vent valve, electrical: Short circuit to ground During engine operation, vibration and movement of the sensor can damage the pin contacts of the harness connector, or cause a break in the wiring.