Question about 2001 Pontiac Bonneville SSEi

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Po446 2001 bonneville evaporative emission vent control 446

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Posted on Jan 02, 2017

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SOURCE: I have a 2003 Pontiac Vibe GT. The engine light

http://www.obd-codes.com/p0446 Please read here.

Posted on May 27, 2010

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SOURCE: P0446 EVAPORATIVE EMISSION VENT CONTROL CIRCUIT

DTC P0446 - Evaporative Emission Control System Vent Control Circuit Malfunction
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. There will be no obvious symptoms to driver, other than MIL illumination.

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


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


Hope this helps (remember to rating this free answer and leave us some testimonial comment).

Posted on Oct 12, 2011

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Chevy tahoe code PO446 2000 TAHOE


Code 446

P0446 Chevrolet Description
The Powertrain Control Module (PCM) monitors the performance of the Evaporative Emission (EVAP) system by applying a predetermined level of vacuum to the EVAP system then monitors the vacuum decay rate.
Possible causes =
- Plugged vapor canister
- Faulty vent solenoid
- Pinched or blocked EVAP hose
- Faulty FTP sensor

Read more: http://engine-codes.com/p0446_chevrolet.html#ixzz3C6NJ1IpZ

Sep 01, 2014 | Cars & Trucks

1 Answer

Toyota echo won't start code 440 441 446


Error Code: P0440
Fault Location:
Evaporative Emission (EVAP) System - Malfunction
Possible Cause:
Malfunction Indicator Lamp (MIL) active.
Soution:
Check Evaporative Emission (EVAP) System Sealing.
Check Evaporative Emission (EVAP) Canister Purge Regulator Valve .
Check Evaporative Emission (EVAP) Canister Purge Solenoid Valve .

Error Code: P0441
Fault Location:
Evaporative Emission (EVAP) System - Incorrect Flow Detected
Possible Solutions:
Check Evaporative Emission (EVAP) Canister Purge Regulator Valve .
Perform Output Test.
Check Evaporative Emission (EVAP) Canister Purge Solenoid Valve .
Check Evaporative Emission (EVAP) Canister.
Perform Basic Setting.
Check Pipes between Tank Breathing and Throttle Body.

Error Code: P0446
Fault Location:
Evaporative Emission (EVAP) System, Vent Control - Circuit Malfunction
Possible Cause:
Wiring harness.
Evaporative emission (EVAP) canister purge valve.
Engine control module (ECM).

Feb 25, 2013 | 2002 Toyota ECHO

1 Answer

Auto scanner code 446


Here is the definition for a Blazer.

P0446 CHEVROLET Description The Evaporative System (EVAP) canister vent control valve is located on the EVAP canister and is used to seal the canister vent.


This solenoid valve responds to signals from the Engine Control Module (ECM). When the ECM sends an ON signal, the coil in the solenoid valve is energized. A plunger will then move to seal the canister vent. The ability to seal the vent is necessary for the on board diagnosis of other evaporative emission control system components.


This solenoid valve is used only for diagnosis, and usually remains opened.
Read more: http://engine-codes.com/p0446_chevrolet.html#ixzz2670glbIb

Sep 10, 2012 | 2004 Chevrolet Blazer

1 Answer

If the obd ll codes show po440 441 and 446 what are the name of this 3 parts do i have to change


440 Evaporative Emission Control System
441 Evaporative Emission System Incorrect Purge Flow
446 Charcoal Canister

Sep 10, 2011 | 2000 Toyota Sienna

1 Answer

Have OBD codes P2A00, P0441, P0442, P0446 on my 2003 Highlander. Selling the car in a few months. Does this really need to be repaired before trade-in? Can I just erase the codes?


NOPE CANT ERASE CODES UNTIL THE PROBLEM IS FIXED OR THE SERVICE ENGINE LIGHT SOON WILL STAY ON. CODE PO441 - EVAPORATIVE EMISSION EVAP SYSTEM INCORRECT FLOW DETECTED.CHECK INTAKE VACUUM HOSE CONNECTIONS AT THE EVAP CANISTER PURGE VALVE.IF ALL IS GOOD.THE EVAP CANISTER PURGE VALVE COULD BE BAD. CODE PO 442 - EVAPORATIVE EMISSION EVAP SYSTEM SMALL LEAK DETECTED. EVAPORATIVE EMISSION SYSTEM LARGE LEAK DETECTED FUEL CAP LOOSE OR OFF MISSING. CODE PO 446 - EVAPORATIVE EMISSION EVAP SYSTEM VENT CONTROL CIRCUIT MALFUNCTION.

May 21, 2011 | Toyota Highlander Cars & Trucks

1 Answer

What are codes po440,441 and 446


the code p0440 is evaporative emission control system malfunction and 0441 is evaporative emission control system, incorrect purge flow,and 0446 is evaporative emission control system,vent control circuit malfunction.

Jun 10, 2010 | 2001 Toyota Corolla

1 Answer

I have a 1998 BMW 323, it having a check engine light on and when i took it to the mechanic they said its code 446 " evap emission control system"


P0446 evaporative emission control system vent control circuit malfunction, u will need to have the delaer test the system for a defective EVAP vent control solenoid

Jun 25, 2009 | 1997 BMW 328

1 Answer

Po code 446 in a chevy blazer 96


P0446
Evaporative Emission Control
System Vent Control Circuit Malfunction.

Jun 24, 2009 | 2001 Mitsubishi Diamante

2 Answers

Codes 441, 446, 455 on a 2005 Camery


P0441 Evaporative Emission Control System Incorrect Purge Flow
P0446 Evaporative Emission Control System Vent Control Circuit Malfunction
P0455 Evaporative Emission Control System Leak Detected (Gross Leak)
http://www.toyotanation.com/forum/showthread.php?t=128923

Jun 04, 2009 | 2004 Lexus LS 430

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