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P0446 Diagnostic Trouble Code Discussion for November 2011

EVAP Vent System Performance


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Trouble Ticket Help Requests for DTC P0446
Help Request Posted
1999 Toyota Camry LE 3.0L MIL Lamp on VIN: JT2BF28K8X
P0446: EVAP Vent Control Solenoid Circuit Malfunction. ... keeps setting P0446. Replaced canister assembly twice. Is there a special way to smoke system? I smoked system as follows- attach smoke machine to service port and crimp vent hose that comes off canister and goes into crossmember. No leaks detected. This v...
November 07, 2011
1999 Toyota Camry LE 3.0L MIL Lamp on VIN: JT2BF28K8X
P0446: EVAP Vent Control Solenoid Circuit Malfunction. ... keeps setting P0446. Replaced canister assembly twice. Is there a special way to smoke system? I smoked system as follows- attach smoke machine to service port and crimp vent hose that comes off canister and goes into crossmember. No leaks detected. This v...
November 08, 2011
1998 Buick Century Custom 3.1L Poor Fuel Economy, MIL Lamp on
P0446: EVAP Canister Purge Vent Blocked. ... (rich) and code p0446 (evap vent problem) it gets bad fuel milage, i have seen on here that a bad ftp sensor can cause p0446 (it already has a new vent selonid) ftp pid is at 4.3 volts koeo, fuel trim at idle is -25, i can...
November 16, 2011
1996 Chevrolet Blazer 4.3L MIL Lamp on VIN: 1GNDT13W4T
P0446: EVAP Vent System Performance. P0446 Keeps coming back and I am not getting and pressure from fuel tank pressure sensor. Replaced sensor, check wiring. I did clear the vac line from engine to canisiter. It had charcoal in it. I also replaced all sensors. Mitchell tells me the PCM might be b...
November 19, 2011
2006 GMC Sierra 1500 SLT 5.3L MIL Lamp on VIN: 2GTEK13T96
P0446: EVAP Vent System Performance. Hey ya'll, Quick request for info on fuel tank pressure sensor on this truck. With system completely open my sensor is reading 1.35 volts and 14.07 inH2O. Doesn't seem right. I can pull a vac on the closed system or induce pressure and the value changes, but ...
November 22, 2011
1999 Porsche 911 Carrera 3.4L MIL Lamp on VIN: WP0CA2996X
P0446: evap. DTC p0446,p1124,p1126.How do I tell which vent line at engine to check if system holds vacuum or is blocked?
November 22, 2011
1998 Buick Century Custom 3.1L Poor Fuel Economy, MIL Lamp on
P0446: EVAP Canister Purge Vent Blocked. ... (rich) and code p0446 (evap vent problem) it gets bad fuel milage, i have seen on here that a bad ftp sensor can cause p0446 (it already has a new vent selonid) ftp pid is at 4.3 volts koeo, fuel trim at idle is -25, i can...
November 27, 2011
2004 Chevrolet Tahoe LS 5.3L MIL Lamp on VIN: 1GNEK13Z64
P0446: EVAP Vent System Performance. ... using scanner and verified it's ability to open/close (seal & release) I also tested the purge solenoid and it's ability to pull a vacuum on the tank, also the pressure sensor changing with vaccum in tank. Reading other posts suggested that the pressur...
November 30, 2011
1999 Toyota Camry LE 3.0L MIL Lamp on VIN: JT2BF28K8X
P0446: EVAP Vent Control Solenoid Circuit Malfunction. ... keeps setting P0446. Replaced canister assembly twice. Is there a special way to smoke system? I smoked system as follows- attach smoke machine to service port and crimp vent hose that comes off canister and goes into crossmember. No leaks detected. This v...
November 07, 2011
1999 Toyota Camry LE 3.0L MIL Lamp on VIN: JT2BF28K8X
P0446: EVAP Vent Control Solenoid Circuit Malfunction. ... keeps setting P0446. Replaced canister assembly twice. Is there a special way to smoke system? I smoked system as follows- attach smoke machine to service port and crimp vent hose that comes off canister and goes into crossmember. No leaks detected. This v...
November 08, 2011
1998 Buick Century Custom 3.1L Poor Fuel Economy, MIL Lamp on
P0446: EVAP Canister Purge Vent Blocked. ... (rich) and code p0446 (evap vent problem) it gets bad fuel milage, i have seen on here that a bad ftp sensor can cause p0446 (it already has a new vent selonid) ftp pid is at 4.3 volts koeo, fuel trim at idle is -25, i can...
November 16, 2011
1996 Chevrolet Blazer 4.3L MIL Lamp on VIN: 1GNDT13W4T
P0446: EVAP Vent System Performance. P0446 Keeps coming back and I am not getting and pressure from fuel tank pressure sensor. Replaced sensor, check wiring. I did clear the vac line from engine to canisiter. It had charcoal in it. I also replaced all sensors. Mitchell tells me the PCM might be b...
November 19, 2011
2006 GMC Sierra 1500 SLT 5.3L MIL Lamp on VIN: 2GTEK13T96
P0446: EVAP Vent System Performance. Hey ya'll, Quick request for info on fuel tank pressure sensor on this truck. With system completely open my sensor is reading 1.35 volts and 14.07 inH2O. Doesn't seem right. I can pull a vac on the closed system or induce pressure and the value changes, but ...
November 22, 2011
1999 Porsche 911 Carrera 3.4L MIL Lamp on VIN: WP0CA2996X
P0446: evap. DTC p0446,p1124,p1126.How do I tell which vent line at engine to check if system holds vacuum or is blocked?
November 22, 2011
1998 Buick Century Custom 3.1L Poor Fuel Economy, MIL Lamp on
P0446: EVAP Canister Purge Vent Blocked. ... (rich) and code p0446 (evap vent problem) it gets bad fuel milage, i have seen on here that a bad ftp sensor can cause p0446 (it already has a new vent selonid) ftp pid is at 4.3 volts koeo, fuel trim at idle is -25, i can...
November 27, 2011
2004 Chevrolet Tahoe LS 5.3L MIL Lamp on VIN: 1GNEK13Z64
P0446: EVAP Vent System Performance. ... using scanner and verified it's ability to open/close (seal & release) I also tested the purge solenoid and it's ability to pull a vacuum on the tank, also the pressure sensor changing with vaccum in tank. Reading other posts suggested that the pressur...
November 30, 2011