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P0446 Diagnostic Trouble Code Discussion for October 2009

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 on VIN: WPOAA2998X
P0446: Charcoal canister shutoff valve operation. We have run into this code before (PO446) and a canister shut off valve takes care of the problem. This one has decided to buck the system. So we have run extensive tests on every component and tube ETC. The pressure sensor checks OK..the valve is new and work...
October 02, 2009
2002 Mercedes-Benz ML500 5.0L MIL Lamp on VIN: 4JGAB75E52
P0446: evap vent control circuit. hello need help with this veh have no real info in identifix or mitchell,info on code and flow chart would be nice.did basic inspection of system found nothing obvious!
October 06, 2009
1999 Porsche 911 Carrera 3.4L MIL on VIN: WPOAA2998X
P0446: Charcoal canister shutoff valve operation. We have run into this code before (PO446) and a canister shut off valve takes care of the problem. This one has decided to buck the system. So we have run extensive tests on every component and tube ETC. The pressure sensor checks OK..the valve is new and work...
October 08, 2009
2001 Chevrolet Suburban 1500 LS 5.3L MIL Lamp on VIN: 3GNFK16T21
P0446: EVAP Vent System Performance. ... guys but I seem to be getting my share of these evap problems. It seems as though I'm doing battle with at least two of these a week lately. I am hoping someone can shed some light on this one for me. I have trouble code P0446. My smoke machine shows no si...
October 16, 2009
2005 Saturn Ion-2 2.2L MIL Lamp on VIN: 1G8AJ52F05
P0446: EVAP Vent System Performance. I have a P0446 Evap vent control solenoid performance code. I have ran through the tests as for the service procedure. However I can not follow them exactly because I do not have a smoke machine that will let me set a certian amount of pressure in the system. ...
October 17, 2009
2007 Chevrolet Impala LS 3.5L MIL Lamp on, VERRY SLOW FUEL FILL VIN: 2G1WT58K37
P0446: EVAP Vent System Performance. as soon as the fill tube is full you have to stop and wait for it to drain down. there it a (roll over valve in inlet of tank ?) it is not stuck. i think there is one in large vent going to evap canister you can blow through these and canister, vent valve ,and...
October 23, 2009
2004 Chevrolet Suburban 1500 Z71 5.3L MIL Lamp on, VIN: 3GNFK16T24
P0446: EVAP Vent System Performance. we sent the customer on his way, thinking canister vent was the problem. customer came back, complaining he can not complete a fill up. pump pops back. we replaced the fill pipe assembly, it looked collapsed. it did not fix the problem. we have now dropped the...
October 28, 2009
2006 Chevrolet Aveo LS 1.6L MIL Lamp on, refueling problem VIN: KL1TD66656
P0446: EVAP Vent System Performance. Customer came in with vehicle with complaint of refuleing problem with vehicle, MIL has been on a year now, BUT this refueling issue has only been within the last month. He said he the light was on then he unplugged and reconnected the TPS and the light was ou...
October 31, 2009
1999 Porsche 911 Carrera 3.4L MIL on VIN: WPOAA2998X
P0446: Charcoal canister shutoff valve operation. We have run into this code before (PO446) and a canister shut off valve takes care of the problem. This one has decided to buck the system. So we have run extensive tests on every component and tube ETC. The pressure sensor checks OK..the valve is new and work...
October 02, 2009
2002 Mercedes-Benz ML500 5.0L MIL Lamp on VIN: 4JGAB75E52
P0446: evap vent control circuit. hello need help with this veh have no real info in identifix or mitchell,info on code and flow chart would be nice.did basic inspection of system found nothing obvious!
October 06, 2009
1999 Porsche 911 Carrera 3.4L MIL on VIN: WPOAA2998X
P0446: Charcoal canister shutoff valve operation. We have run into this code before (PO446) and a canister shut off valve takes care of the problem. This one has decided to buck the system. So we have run extensive tests on every component and tube ETC. The pressure sensor checks OK..the valve is new and work...
October 08, 2009
2001 Chevrolet Suburban 1500 LS 5.3L MIL Lamp on VIN: 3GNFK16T21
P0446: EVAP Vent System Performance. ... guys but I seem to be getting my share of these evap problems. It seems as though I'm doing battle with at least two of these a week lately. I am hoping someone can shed some light on this one for me. I have trouble code P0446. My smoke machine shows no si...
October 16, 2009
2005 Saturn Ion-2 2.2L MIL Lamp on VIN: 1G8AJ52F05
P0446: EVAP Vent System Performance. I have a P0446 Evap vent control solenoid performance code. I have ran through the tests as for the service procedure. However I can not follow them exactly because I do not have a smoke machine that will let me set a certian amount of pressure in the system. ...
October 17, 2009
2007 Chevrolet Impala LS 3.5L MIL Lamp on, VERRY SLOW FUEL FILL VIN: 2G1WT58K37
P0446: EVAP Vent System Performance. as soon as the fill tube is full you have to stop and wait for it to drain down. there it a (roll over valve in inlet of tank ?) it is not stuck. i think there is one in large vent going to evap canister you can blow through these and canister, vent valve ,and...
October 23, 2009
2004 Chevrolet Suburban 1500 Z71 5.3L MIL Lamp on, VIN: 3GNFK16T24
P0446: EVAP Vent System Performance. we sent the customer on his way, thinking canister vent was the problem. customer came back, complaining he can not complete a fill up. pump pops back. we replaced the fill pipe assembly, it looked collapsed. it did not fix the problem. we have now dropped the...
October 28, 2009
2006 Chevrolet Aveo LS 1.6L MIL Lamp on, refueling problem VIN: KL1TD66656
P0446: EVAP Vent System Performance. Customer came in with vehicle with complaint of refuleing problem with vehicle, MIL has been on a year now, BUT this refueling issue has only been within the last month. He said he the light was on then he unplugged and reconnected the TPS and the light was ou...
October 31, 2009