evap system help

[dcarr]

so my third gen is throwing a p0446 code. autozone said its an evap code. has anyone had this and what was it? thank you, dan

 

[stamp11127]

From OBD-Codes.com

P0446 Evaporative Emmission Control System Vent Control Circuit
OBD-II Trouble Code Technical Description

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:

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

 

[dcarr]

thank you, great site to know about. next question, where is the vent located?

 

[stamp11127]

Don't have a clue for the 3rd gen, mine is 1st gen. On the 1st gens it(purge valve) is located on driver side above/near the high pitch horn.
The vent valve may be new since the 1st gens.

 

[dcarr]

ok thanks for your help