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Impala code P0446 - 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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Service engine light is on reading code p0446 for 2003 chevrolet impala pictures on how to fix

A code P0446 could mean one or more of the following has happened:

  • Faulty vent valve
  • Open, short or excessive resistance on Vent valve control circuit
  • Blockage of vent valve
  • Bad PCM
  • use maxiscan us703 clear the fault codes.

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I have a 2006 chevy Impala 3.5 v6 Flex fuel with OBD code po446 what is it and where is it Dennis

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

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I have an error code p0446, please help

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