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P0446 Diagnostic Trouble Code Discussion for August 2008

EVAP Vent System Performance


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Trouble Ticket Help Requests for DTC P0446
Help Request Posted
2000 Nissan Pathfinder LE 3.3L MIL Lamp on, Intermittent misfire VIN: JN8AR07YXY
P0446: EVAP Vent Control Solenoid Circuit Malfunction. Since above repairs on several occassions CEL would come on and sometimes flash with rough run intermittently. Typically when came in was running well. Read and clear codes. Very difficult to get this vehicle away from customer long enough to diagnose anythi...
August 10, 2008
2000 Land Rover Discovery Series II 4.0L Poor Fuel Economy, MIL Lamp on VIN: SALTY1249Y
P0446: Evap. emissions vent control circuit. ... am using Generic data on a Modis. I try to use custom data list to speed up the refresh rate, sometimes checking only two pids at a time. I am frustrated that I am getting P1171 and P1174 yet the STFT and LTFT for bank 1 and...
August 14, 2008
2000 Land Rover Discovery Series II 4.0L Poor Fuel Economy, MIL Lamp on VIN: SALTY1249Y
P0446: Evap. emissions vent control circuit. ... am using Generic data on a Modis. I try to use custom data list to speed up the refresh rate, sometimes checking only two pids at a time. I am frustrated that I am getting P1171 and P1174 yet the STFT and LTFT for bank 1 and...
August 18, 2008
1998 Toyota Land Cruiser 4.7L MIL Lamp on VIN: JT3HT05J7W
P0446: EVAP Vent Control Solenoid Circuit Malfunction. ... back with a P0446 code in it. We are having difficulty testing the system and finding anything wrong. We have smoke tested the system. I feel like we are missing something or not testing the system correctly. This is the early design system. I have searche...
August 19, 2008
2000 Nissan Pathfinder LE 3.3L MIL Lamp on, Intermittent misfire VIN: JN8AR07YXY
P0446: EVAP Vent Control Solenoid Circuit Malfunction. Since above repairs on several occassions CEL would come on and sometimes flash with rough run intermittently. Typically when came in was running well. Read and clear codes. Very difficult to get this vehicle away from customer long enough to diagnose anythi...
August 10, 2008
2000 Land Rover Discovery Series II 4.0L Poor Fuel Economy, MIL Lamp on VIN: SALTY1249Y
P0446: Evap. emissions vent control circuit. ... am using Generic data on a Modis. I try to use custom data list to speed up the refresh rate, sometimes checking only two pids at a time. I am frustrated that I am getting P1171 and P1174 yet the STFT and LTFT for bank 1 and...
August 14, 2008
2000 Land Rover Discovery Series II 4.0L Poor Fuel Economy, MIL Lamp on VIN: SALTY1249Y
P0446: Evap. emissions vent control circuit. ... am using Generic data on a Modis. I try to use custom data list to speed up the refresh rate, sometimes checking only two pids at a time. I am frustrated that I am getting P1171 and P1174 yet the STFT and LTFT for bank 1 and...
August 18, 2008
1998 Toyota Land Cruiser 4.7L MIL Lamp on VIN: JT3HT05J7W
P0446: EVAP Vent Control Solenoid Circuit Malfunction. ... back with a P0446 code in it. We are having difficulty testing the system and finding anything wrong. We have smoke tested the system. I feel like we are missing something or not testing the system correctly. This is the early design system. I have searche...
August 19, 2008