There is air escaping from the gas tank. Often a problem with the gas cap, try tightening the cap, reset the code and see if it comes back on. Essentially it is testing for cracks in the tank.
P0449 Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction
I have a 2000 VW Passat. I need to locate the Evaporative Emission system pure control valve circuit. Any info would be appreciated
This ODB code could indicate a problem with any part of the evaporative emission control system: gas cap, rubber hoses, canister, or purge solenoid.
Evaporative emission system purge control valve circuit
evaporative emission control sytem purge control circuit malfunction
Evaporative Emission Control system vent control Circuit po446 code
Evaporative Emission Control System Vent Control Circuit Malfunction
P0444 Evaporative Emission Control System Purge Control Valve Circuit Open
P0499 Evaporative Emission System Vent Control Circuit High
Evaporative Emission System Switching Valve Control Circuit/Open This is referring to a problem with the evaporative emission system. A technician should be able to determine exactly what part of the system is malfunctioning.
where is the evaporative emission system vent control circuit in chevy impala (200)
P0444, Evaporative Emission Control System Purge Control Valve Circuit Open.