Join Now
International Automotive Technicians Network

P0446 Diagnostic Trouble Code Discussion for May 2014

EVAP Vent System Performance


Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Trouble Ticket Help Requests for DTC P0446
Help Request Posted
2004 Ford Taurus SES 3.0L MIL Lamp on VIN: 1FAFP55S44
P0446: Evap Emission control system vent control circut. ... command valve on with scan tool. smoke checked and found very slight leak at canister vent valve on right rear with the carbon canister. disconnect the valve and put an incandescent test light in the circuit, it lights bright so I don't think there is an i...
May 05, 2014
2006 Pontiac Grand Prix 3.8L MIL Lamp on VIN: 2G2WP58256
P0446: EVAP Vent System Performance. ... monitors mil is back on with same P0446. Cat conv not ready all other monitors included evap are ready. No TSB. cannot determined the cause. need help. Thanks.
May 05, 2014
1999 Porsche 911 Carrera 3.4L MIL Lamp on VIN: WP0AA2992X
P0446: evaporative canister shut off valve. ... had an intermittent check engine light. the codes now present are (P0452 TANK PRESSURE SENSOR and P0446 EVAPORATIVE CANISTER SHUTOFF VALVE) he has replaced a number of parts over the years including the charcoal canister, regeneration valve in engine compa...
May 07, 2014
2004 Ford Taurus SES 3.0L MIL Lamp on VIN: 1FAFP55S44
P0446: Evap Emission control system vent control circut. ... command valve on with scan tool. smoke checked and found very slight leak at canister vent valve on right rear with the carbon canister. disconnect the valve and put an incandescent test light in the circuit, it lights bright so I don't think there is an i...
May 14, 2014