A2: Mechanical System Check

Carry out a system mechanical verification.

- Fuel cap missing or incorrectly fitted?
Fuel cap seal defective?
Leak/damage on carbon canisters or evaporative pipework?
CCV incorrectly fitted?
Purge valve vacuum line leak or blockage?
Purge line blocked?
Purge line damaged/leaking?

Yes
Rectify fault(s)
GO to A6 A6: End
No
GO to A3 A3: Check Purge Valve Resistance