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P0446 Evaporative Emission Control System Vent Control Circuit. The most common cause is the gas cap left off and someone drove the car or the cap was not fully locked it will set the code. Some other causes are leaking evaporative emission Plumbing from the fuel tank to the engine compartment, someone changed the fuel pump and did not seal it properly. Failure of a emission component in the evap system. The only way to diagnost these is an OBDII scan tool and a smoke machine the light will come on when the computer does its test of the system and there is a hole as small as .020" 1/20,000 of an inch ! The light can only be turned off by a OBDII scan tool
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1997 Chevy venture check engine light blinks?
If the check engine light is blinking that means an engine cylinder misfire has been detected
What does it mean when the check engine light flashs in a 2002 Chevy Express van?
If the check engine light is flashing as you are driving it means you are about to destroy the catalytic converter(s). Stop the engine and get it to a garage.
What does the service engine soon light mean on a 2002 Chevy 2500HD 6.0?
The check engine light means there is a problem with the emission systems on the vehicle. The service engine light means that a regular schedule service is needed. Most of the time this means you need an oil/filter change.
Your check engine light is on on your 2005 Chevy Tahoe what does that mean?
It means there is a problem in the emission system are transmission. Need to have engine scaned with a engine scanner. Some parts stores will do that for free.
What causes a check engine light on a Chevy Astro van?
That means that the computer see's a problem with the emmission system are the transmission. Need to have engine scaned with a engine scanner to see what is going on.
Check light is on why?
check engine light means a problem with the emission system
What if service engine light is blinking on a Chevy silverado?
Normally a flashing check engine light means you have a misfire. Do not ignore this as an engine misfire will damage the O2 sensor and the catalytic converter which are very expensive to replace. Have this repaired immediately.
Check engine light won't come on?
If an check engine light does not come on it is a good thing. When your check engine light comes on, it means you need service done on your vehicle.
What does it mean when the check engine light on a 2000 Toyota Sienna is on?
it means you need to check the engine
2006 Nissan Xterra check engine light on?
I think it means you need to check your engine.
Why does a Chevy venture engine light flash off and on?
If the check engine light is flashing off and on when the engine is running that means an engine cylinder(s) misfire has been detected . You need to have the vehicle scanned for any trouble codes to help diagnose and then repair the problem
Why is your Ford F150 shaking and the check engine light is flashing?
If the check engine light is flashing that means an engine cylinder misfire has been detected
