Check Valve Inspection
WARNING: This page is about a different car, the 2018 Mazda CX-5. However, it is still accessible from the selected car via links, so may be relevant.
- Remove the breather pipe. (See Fuel Tank Removal/Installation .)
- Verify that there is airflow when positive pressure is applied to port A.
- If there is no airflow, replace the breather pipe. (See Fuel Tank Removal/Installation .)
- Verify that there is airflow when negative pressure is applied to port A.
- If there is no airflow, replace the breather pipe. (See Fuel Tank Removal/Installation .)