Here's a link on your code Fred. https://www.obd-codes.com/p0446
SOURCE: 2006 chev malibu p0446 code
You need to find out which evap control solinoid is not working the best way is to take it to a shop and have them run a smoke test through the system todetermine which valve or valves are inop,or if there is a break in the hoses.
SOURCE: check engine code "P0446 Evap Control System Vent Control Circ"
Unfortunately, this code has nothing to do with the gas cap....
A code P0446 could mean one or more of the following has happened:
Here are some things you could try to fix it:
SOURCE: 2003 ford escape.......code p0446 Evaporative
Most likely evap vent solenoid needs to be replaced. Locate replacement solenoid at auto parts store or dealer & replace.
SOURCE: p0446 code 1998 gmc jimmy how do I fix this? where is it located?
A fault code is not located anywhere except in memory of the computer. A fault code indicates a problem exists int a system, a system contains many parts.
Evaporative Emission Control System Vent Control Circuit Malfunction
What does that mean?
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 Batt. 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:
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