Rep: 13
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how to fix code P0446 on a 1999 chevy tahoe
probable cause
purge or vent solenoid defective
saturated vapor canister
failed evap vent solenoid need to know what parts to get to fix
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Evap vent valve has only one purpose. It closes in order to seal the vent so the EVAP system can pressurize and ensure there are no leaks. Evap vent valve is usually supplied Battery voltage with key on. The ECM's driver controls the ground, and when grounded, activates the valve (closing it). If the ECM detects a short to ground, and open,or a short to battery voltage on the control circuit, P0446 will set. Code also may refer to ECM detecting that EVAP system is unable to achieve or maintain vacuum during test.
Symptoms
There will be no obvious symptoms to driver, other than MIL illumination.
Causes
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
Possible Solutions
With a P0446 OBD-II trouble code, here are some things to try:
Replace Vent valve
Repair open, short, or resistance problem in control circuit
Repair open, or short, or resistance problem in power circuit
Replace PCM
Check the sensor in the engine
Replace the Vsv for the charcoal canister
Look for a disconnectted or damaged hose around the air filter box that goes the evap solenoid
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complete answer +
Rep: 13
1
Where is it located on a 2000 Tahoe limited 5.7? Thnx
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replace both because i had the same problem. and got the same codes. they do the same. because pcm don't know with one.
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Chevy dealers parts counter.
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Good Luck,
N
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- Jeez what a great answer. They should shut down the site with answers like this. WHY did you even bother?
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1 commentaire
Have you been to all your local auto parts stores?
par originalmachead