P0446 Diagnostic Trouble Code Discussion for April 2011
EVAP Vent System Performance
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| Help Request | Posted | |
| 2004 Chevrolet Silverado 2500 HD 6.0L Misfire VIN: 1GCHK29U24 P0446: EVAP Vent System Performance. Hi guys. I have a 2004 Chevy Silverado 2500HD. Has misfires on all cylinders. Customer replaced plugs and wires with new sets, hoping to cure the problem. We have done a crank relearn, which did not help. We replaced the crankshaft sensor, still no change. We ... |
April 21, 2011 | |
| 2004 Saturn Ion-1 2.2L MIL Lamp on, inaccurate fuel gaug VIN: 1G8AJ54F94 P0446: EVAP Vent System Performance. Howdy, Need help here folks. i've spent alot of time on this saturn. I'll cut to the chase, Sets Po446 one day after clearing, alldata and OBD say po446 is a direct result of a vent circuit restriction in the Evap system, Ive replaced the vent valve and a faul... |
April 30, 2011 |
