Emission control system vent circuit malfunction. How to fix this
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:
P0446....Evaporative Emission Control System Vent Control Circuit
this vehicle should not have failed with this code ,its a rubber pipe perished or split ,short answer ice road truckers is back on after adverts sorry
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my friend has an 06 Malibu and has taken it to a dealership and has been told this is a common thing in these cars my question is can it be fixed?
po443Evaporative3 Emission System Purge Control valve Circuit wat cany doo
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