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P0446 Diagnostic Trouble Code Discussion for September 2010

EVAP Vent System Performance

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Trouble Ticket Help Requests for DTC P0446
Help Request Posted
1999 Porsche 911 Carrera 3.4L MIL Lamp on VIN: WPOAA2999X
P0446: EVAP cannister shut off valve below lower limit. We have this 996 in the shop that keeps setting PO446 EVAP code. Alldata states that this code is set if the purge air line is blocked or the cannister is getting plugged. The shutoff valve works OK. All of the lines are open and no blockage. The cannister is ...
September 07, 2010
2006 Ford Ranger Sport 4.0L MIL Lamp on, failsafe mode VIN: 1FTYR15E46
P0446: evap system vent control fault. Towed vehicle in because customer parked vehicle in parking lot for about an hour; no prior symptoms. When he came back to truck and started it, it went into failsafe; engine light came on and O/D light flashed. Barely moved on acceleration. When vehicle came ...
September 13, 2010
1998 Toyota Camry LE 2.2L MIL Lamp on, noise VIN: JT2BG22K1X
P0446: EVAP Vent Control Solenoid Circuit Malfunction. well i was wondering if anybody has encounter a moaning, whale howling mating call noise coming from the gas tank of this car. i messed around with the evap and it stopped i was wondering if someone could confirm the charcoal canister with or vent valve or the...
September 15, 2010
2003 Chevrolet Silverado 1500 LT 5.3L MIL Lamp on VIN: 1GCEK19T03
P0446: EVAP Vent System Performance. ... When code first set we could not get the vent solenoid to vent so we did the TSB, it lasted for about 2 weeks then 446 again. The second time my tech found the fuel tank pressure sensor indicated 10 inches of vacuum,I think it was fine the first time but I...
September 22, 2010