Fault Codes P0442, P0445

[vljbbeach]

My duremetric states fault codes are Leaks detected in Fuel system. Is it recovery vapor system? If so where do I start testing. Gas cap seal is good. Having trouble filling my gas tank to the top. Car will stall every now and again. Throwing fault codes. Clean throttle body and Maf sensor. No vacuum sound when opening gas cap. Seal is new. Can I test bleeder valves and how?
Thanks
Vin

[JFP in PA]

Originally Posted by vljbbeach

My duremetric states fault codes are Leaks detected in Fuel system. Is it recovery vapor system? If so where do I start testing. Gas cap seal is good. Having trouble filling my gas tank to the top. Car will stall every now and again. Throwing fault codes. Clean throttle body and Maf sensor. No vacuum sound when opening gas cap. Seal is new. Can I test bleeder valves and how?
Thanks
Vin

You didn't give the year and model, which is always helpful in these things, but I will take a shot at it: P0442 is the code for a small leak in the fuel ventilation system; P0445 is for the failure of your EVAP system purge valve, which is probably the source of the leak.

[vljbbeach]

Thank you for the reply. 2003 Porsche 911 Carrera 4 Cab. with a 996 engine.
P code info is greatly appreciated. Will look into replacing this.
You where very helpful.
I hope this resolves my issue.
Thanks
Vin