![]() ![]() If there is no vacuum you could still have an intermittent failure of the Purge Volume Control Valve or another EVAP system issue. If there is a vacuum, then the Purge Volume Control Valve is leaking and needs to be replaced. ![]() Now, start the engine and use either a vacuum gauge or your finger to see if the vacuum is coming out of the Purge Volume Control Valve where you removed the hose. (performing this test may set another code if it does, clear the code and disregard it until after the test is completed and the vehicle is put back together). With the key and engine off, remove the hose going to the Purge Volume Control Valve coming from the fuel tank and unplug the electrical connector to the valve. If the code returns, test the Purge Volume Control Valve for a Stuck Open condition. STEP 2: TEST THE PURGE VOLUME CONTROL VALVE. Reset the Check Engine Light to see if the Check Engine Light returns in the future. Tools/parts needed (our top picks from Amazon): This repair requires mechanical knowledge and is not recommended for beginners. Diagnosis beyond oil level and condition requires more specialized equipment beyond what the FIXD Sensor can provide and it can be a time and labor-intensive process for inexperienced DIYers. Keep in mind this is an intermediate-level diagnosis and repair and not recommended for beginners. If you’d like to try to fix code P0496 at home without throwing money at parts, you’ll want to follow the steps below for proper diagnosis.
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