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What is your question?
poor mileage
2 Replies
Check this link http://www.obd-codes.com/p0446 but an evap related trouble code may not be the total cause of poor gas mileage. Sure the fault code needs to be fixed to keep your car "smog compliant" but other tests may be needed to verify or fix the cause or poor miles per gallon.
P0446 Evaporative Emmission Control System Vent Control Circuit With a P0446 OBD-II trouble code, here are some things to try: Replace Vent valve Repair open, short, or resistance problem in control circuit Repair open, or short, or resistance problem in power circuit Replace PCM