Question about 2001 Chevrolet Impala
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Posted on Jan 02, 2017
SOURCE: 2001 chevy impala code p0446
This is an indication of a fault with fuel evaporative control system. The system consists of vapour coming off from 'sealed' (always check that your gas cap is on good and tight after refills) fuel in the tank being trapped in a carbon filled canister or trap. Also fitted to this trap is a vent tube with a solenoid operated valve to the atmosphere and a purge tube with a solenoid operated valve to the inlet manifold. When the engine cold the purge valve remains closed. Once warmed up the purge valve opens to allow fuel vapour to contribute to the intake to the engine. When the engine revs higher the vent valve opens to allow external air to help flush out vapour from the trap to the engine. The error code says that there is an error with this vent valve (most likely that it is not opening when it should). To check put a voltmeter across the electrical contacts on it and just check for resistance /continuity. If there is no continuity the solenoid has most likely burnt out. A further check is to apply 12volts across the electrical contacts and this should be seen to open and close the valve. If you find that this fault is any way affecting the function of the car, as a temporary measure simply block the purge tube as it enters the inlet manifold (sometimes on the throttle body). This is only a temporary fix as if left like this it will fail its next test.
Posted on Jun 23, 2010
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Jun 06, 2017 | Ford Cars & Trucks
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Apr 11, 2014 | 2001 Chevrolet Impala
A code P0446 could mean one or more of the following has happened:
May 21, 2012 | Chevrolet Impala Cars & Trucks
this obd2 trouble code table can help you understand the meaning of code.
for p0446, you can try:
Replace Vent valve
Repair open, short, or resistance problem in control circuit
Repair open, or short, or resistance problem in power circuit
Sep 04, 2011 | 2006 Chevrolet Impala
Oct 21, 2010 | 2004 Chevrolet Impala
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