[amidgeha]

Evaporative Emission System Pressure Sensor/Switch

The Evaporative Emission System (EVAP) control system pressure sensor detects pressure in the purge line. The sensor output voltage to the Engine Control Module (ECM) increases as pressure increases. The EVAP control system pressure sensor is not used to control the engine system. It is used only for on board diagnosis.

Cause:
Faulty Evaporative Emission System (EVAP) Pressure Sensor
Evaporative Emission System (EVAP) Pressure sensor harness is open or shorted
Evaporative Emission System (EVAP) Pressure sensor circuit poor electrical connection
Faulty Engine Control Module (ECM)

Symptoms:
Check engine light