My H2 has recently registered an emission code, P0446 Evaporative Emission Control System Vent Control Circuit Malfuction. I haven't purchased the manuals to determine what the problem is but was wondering if anyone had run across this problem. Any info would be greatly appreciated.

Thanks.......Hombre

 

check your gas tank filler cap. this sets if the fuel tank vacuum doesn't return to close to 0 within a calibrated time (not sure what that time is though). if the condition is temporary, it should clear itself after 3 ignition cycles. otherwise, could be a slew of things wrong, but they should all be covered under warranty for a 5 year period since it's part of the emission control system.

 

they had alot of problems with the vent valve