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04 chevy avalanche. failed inspection. OBD11

04 chevy avalanche. failed inspection. OBD11 failue code is PO446. What does this code mean?

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Hi, a P0446 means Evaporative Emission Control System Vent Control Circuit Malfunction

Full details @ http://www.obd-codes.com/p0446

Posted on Feb 06, 2010

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My 2007 Chevy Avalanche failed the emission test with the code of P0455 what is the problem?


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The following codes show up on my 2006 chevy colorado PO106 PO116 PO455 PO446 PO496 PO036 PO030


All these codes indicate that maybe you lost your reference signal from the computer. What someone will have to do is check fo voltage and grounds from the PCM on the coolant temp sensor, Both 02 sensor heater circuits, the evap purge solenoid and the gas tank pressure sensor. Its possble the computer failed or you poped a PCM fuse in the fuse box under the hood. The cover should have a legend to tell you which is which but I would pull all of them and inspect anyways.

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What does an obd11 code of po446 mean on a 2000 chevy silverado 1500?


It is for the canister vent solenoid. Gm has a service bulletin out on this. They have changed the location of the solenoid. They have a repair kit for about 100 dollars that comes with the solenoid and the lines and instructions for moving the solenoid to its new location.

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I have a 2005 chevy avalance code po894 came up what does this mean


what is trouble shooting code po894 for 2005 chevy avalanche

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2003 toyota highlander OBD code's po442/po446/po441


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