P0440

Fuel Tank Breathing Functional Check Fault.

P0440 - Fuel tank breathing functional check fault.: Last occurrence - minimum signal

Possible causes:
1. Leak from purge system.

1. Leak from purge system.
There is a fault with the fuel tank breathing system.

Check the following:
- Electrical connections to the purge valve.
- Purge valve is functioning correctly.
- Purge valve is opening and sealing correctly.
- Pipes for leaks and blockages.