Component Tests and General Diagnostics

Diagram Chart:

DIAGNOSTIC SYSTEM CHECK
Always start diagnosis with the powertrain on-board Diagnostic System Check. This will reduce diagnostic time and prevent unnecessary parts replacement. Testing and Inspection

EVAP SYSTEM DIAGNOSIS
The Enhanced Evaporative Emission (EVAP) control system diagnosis is covered in the following Diagnostic Trouble Codes (DTCs):

^ DTC P0440 - EVAP System
^ DTC P0443 - [1][2]EVAP Purge Valve Control
^ DTC P0446 - EVAP Vent Valve Control
^ DTC P0450 - [1][2]EVAP Fuel Tank Pressure Sensor Circuit
^ DTC P0455 - EVAP System Large Leak Detected