2003 H2 Emission Codes
 

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

RE: 2003 H2 Emission Codes
 

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.

RE: 2003 H2 Emission Codes
 

they had alot of problems with the vent valve