P0440

DTC P0440
Evaporative control system fault Drive cycle C:Signal out of range - above maximum.

Possible causes:
- Cannister purge valve fault - stuck open.

Cannister purge valve fault - stuck open.
CHECK THE FOLLOWING:
- Disconnect purge valve. Attempt to suck air through closed valve using suitable tool.
POSSIBLE FAULTS
- Faulty purge valve.