Question about 2006 Chevrolet Equinox

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I HAVE A CODE PO440" EVAP EMISSION CONTROL SYSTEM LEAK" ( Small ). Is this a serious problem and what do I need to do to fix the problem?

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Not a serious problem at all, in fact if u have no emmisions testing u dont have to do **** with it. evap means evaporative emmisions system which is a system that stores fuel vapors that build pressure in ur tank so they dont leak out into the atmosphere, then when the time comes the cars computer purges the vapors into the motor to burn it properly.even if u take ur car to a shop chances are they wont be able to find a small leak. chances are it could be gas cap related. heres what i would do. take the gas cap off and look down inside the filler tube right there in the opening. if its palstic in there then look for any cracks. make sure theres no rust on the cap sealing surface and for the cost get a new gas cap from the parts store. put a little vasoline on the rubber seal of the new cap and put it on. remember it could take a week or more for the light to go out even if the problem is fixed.

Posted on Aug 25, 2010

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NOPE CANT ERASE CODES UNTIL THE PROBLEM IS FIXED OR THE SERVICE ENGINE LIGHT SOON WILL STAY ON. CODE PO441 - EVAPORATIVE EMISSION EVAP SYSTEM INCORRECT FLOW DETECTED.CHECK INTAKE VACUUM HOSE CONNECTIONS AT THE EVAP CANISTER PURGE VALVE.IF ALL IS GOOD.THE EVAP CANISTER PURGE VALVE COULD BE BAD. CODE PO 442 - EVAPORATIVE EMISSION EVAP SYSTEM SMALL LEAK DETECTED. EVAPORATIVE EMISSION SYSTEM LARGE LEAK DETECTED FUEL CAP LOOSE OR OFF MISSING. CODE PO 446 - EVAPORATIVE EMISSION EVAP SYSTEM VENT CONTROL CIRCUIT MALFUNCTION.

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Try checking The last two on the list.
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    EVAP (Evaporative Emission System) small leak/no flow condition
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    P0440 - Evaporative Emission (EVAP) System


    evaporative emission (EVAP) system has a large leak.
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    The Powertrain Control Module (PCM) at different times performs various tests on the EVAP system. OBD II Enhanced EVAP systems are in place to keep fuel tank vapors from venting into the atmosphere, and instead purges them into the engine to be burned. Regular pressure tests are conducted by the PCM to monitor the sealed system for leaks. The PCM monitors the EVAP system pressure by watching the Fuel tank pressure sensor (FTP). When the sensor indicates a small leak in the EVAP system, this code is set.


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    * The EVAP Canister may be leaking

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