Got code p0446 on my grand am what is it - Cars & Trucks

P0446 is a code for the EVAP vent valve . This part is under the vehicle near the fuel tank , not on the fire wall . That is the purge valve .
P0446 Ford EVAP System Vent Control Circuit
Repair Ford Escape P0446 EVAP Vent Problem

P0446 Evaporative Emission Control System Vent Control Circuit Malfunction. The code P0446 is set when the engine computer recognizes a fault or restriction at the vent control part of the Evaporative emission control system (EVAP).

https://www.obd-codes.com/p0446

P0446Evaporative Emission (EVAP) Vent System Performance=ECM, PCM

U1153 Loss of Communications with HVAC

try googling for the error code

code p0446 refers to evaporative emission (EVAP) system vent control--circuit malfunction===causes--wiring---EVAP canister purge valve--ECM. Change the purge valve.

Please select the link below to further research this particular issue.http://www.gmtruckclub.com/forum/showthread.php/18964-Quick-fix-for-code-p0446-evap-emissions-vent-circuit-low.
orhttp://www.google.com/#hl=en&sugexp=pfwl&cp=42&gs_id=1v&xhr=t&q=+code+p0446+on+a+2001+cheve+silverado+1500&pq=code+p0446+chevy&pf=p&sclient=psy-ab&source=hp&pbx=1&oq=+code+p0446+on+a+2001+cheve+silverado+1500&aq=f&aqi=&aql=&gs_sm=&gs_upl=&bav=on.2,or.r_gc.r_pw.,cf.osb&fp=37320e696dd5b6f0&biw=1360&bih=603&bs=1

Please let me know if you need further assistance. From what I have read from these sites it is a valve or a sensor.

P0446 - Evaporative Emmission Control System Vent Control Circuit
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


Review this information, Test it and tell us news.

P1442 usually gas cap. P1449 usually vent solenoid. P1441 usually always a faulty FTP sensor. Very problematic to Malibu, Grand Am Cavaliers and Aleros. That would be my first area to check. They are also known for poor wiring connections at the Left rear passthru connector to the fuel tank and vent solenoid, but not necessarily for that code.

The evap system may be located right next to the fuel tank. You'll most likely see a can, hoses, solenoids, etc.

I hope this points you in the right direction! :)

how did you fix your p0446 code?