Question about Hyundai Motor 2003 Elantra

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MY CAR IS A HYUNDAI 2003 elantra my problem is engine lite is on dtc po446 evaporative emission system vent control circuit i like get some anwer cause my last question where, answer was needthey. ask mi for all information already posted and i do and ,was ignored please tel me where the vent control is located also my air bag,lite is on with dtc (1) flash on dash board

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  • leonel alvarado Sep 13, 2010

    yes i will erase check engine lite. and repl gas cap air bag is,ok donot bother me to much thanks

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Your post is fairly vague...
a P0446 can be caused by many things including but not limited to a defective gas cap

to diagnose you need a factory scanner and a "smoke machine"

with these two you can control the system and fill it with smoke to find the source of the leak

the reasoning for this testing method is because the size of the hole you are looking for in the EVAP system is about the size of a pin tip

as for the air bag... do not mess with it...seek professional assistance because static electricity can deploy the bags

Posted on Sep 13, 2010

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Posted on Jan 02, 2017

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Evap System, 2003 Buick Century, PO446 , Engine light on


P0446: Evaporative Emission System Vent Control Circuit
Probable cause:
  1. Sensor or solenoid faulty
  2. Connector terminal contact damaged or corroded
  3. Wire harness fault. Check for correct voltage, open, short to ground or short to voltage
  4. Control unit software needs updating
  5. Powertrain or Engine Control Module faulty
  6. Vacuum leaks, damaged hoses or incorrect routing
  7. EVAP system - Check fuel cap, canister, valves or components

Jun 08, 2017 | 2003 Buick Century

2 Answers

Having problems filling the fuel tank on my 2001 hyundai elantra. Any solutions?


Common code you have there. My 2001 Elantra has kicked at least one if not both several times. The simplest trick is to get the cap tighter. Turn it till it clicks, then lean into it and see if you can get a few extra clicks. Ever since I've done this I haven't gotten these codes. Once you've done that, you can remove the battery cable for 30 minutes and then reinstall. The check engine light should be off then, but of course now you'll have to reset your clock and radio. This car is getting older, so it could very well be that something much larger is going wrong, so good luck and here's hoping!

P0450
- Faulty Evaporative Emission System (EVAP) Pressure Sensor
- Evaporative Emission System (EVAP) Pressure sensor harness is open or shorted
- Evaporative Emission System (EVAP) Pressure sensor circuit poor electrical connection
- Faulty Engine Control Module (ECM)

P0446
- Missing Fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- Vent control valve harness is open or shorted
- Vent control valve circuit poor electrical connection
- Faulty vent control valve

Feb 19, 2015 | 2001 Hyundai Elantra

2 Answers

What does code p0446 mean on a 2001 Buick Centry?


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). The description of the fault varies between different car manufacturers, but one thing is common, the code P0446 doesn't directly point to a defective part; some testing might be required to pinpoint the faulty component. What can cause the code P0446: - faulty vent control valve - blockage at the vent hose, vent filter or vent control valve - open or short in the vent control valve circuit - bad charcoal canister - EVAP system leak - faulty EVAP system pressure sensor - bad vacuum switching valve (VSV) - stuck open purge valve (solenoid)

Aug 13, 2014 | 2001 Buick Century

1 Answer

P0449 OBD2 code meaning for 2004 Hyundai Elantra?


EVAP purge/vent solenoid circuit condition. the PCM has determined that a malfunction exists in the electrical circuit for the vent valve/solenoid in the evaporation emission control system (EVAP)

Dec 07, 2011 | 2004 Hyundai Elantra

1 Answer

Car will not start and when scanned I get the problem code P0447


EVAP Vent Solenoid Circuit. Check the solenoid valve on the Fuel Tank vapor circuit.

P0447 Evaporative Emission Control System Vent Control Circuit Open

Feb 06, 2011 | 1997 Hyundai Elantra

2 Answers

What does po440 on a 2003 saturn vue mean with a service engine soon light on


That is a problem in the evaporative emission control system.
Could be anything causing it
Clogged filter in the charcoal canister
A leak in one of the vacuum lines
The purge valve not working,,,etc.
The best thing is to take it and have it checked out, they might have to do a smoke test to find the problem.
All they do is inject smoke into the system, if there is a leak the smoke will come out of it. All it takes is a pin hole in these emission systems to screw it all up.

Aug 13, 2010 | 2003 Saturn VUE

2 Answers

I checked the codes and one comes up its po446. i dont under stand what it mean so i cant fix it to get the light to go out.


P0446 Evaporative Emission System Vent Control Circuit.
The following are descriptions of all Evaporative possible codes:

P0441 Evaporative Emission System Incorrect Purge Flow
P0442 Evaporative Emission System Leak Detected (small leak)
P0443 Evaporative Emission System Purge Control Valve Circuit
P0444 Evaporative Emission System Purge Control Valve Circuit Open
P0445 Evaporative Emission System Purge Control Valve Circuit Shorted
P0446 Evaporative Emission System Vent Control Circuit
P0447 Evaporative Emission System Vent Control Circuit Open
P0448 Evaporative Emission System Vent Control Circuit Shorted
P0449 Evaporative Emission System Vent Valve/Solenoid Circuit
P0450 Evaporative Emission System Pressure Sensor/Switch
P0451 Evaporative Emission System Pressure Sensor/Switch Range/Performance
P0452 Evaporative Emission System Pressure Sensor/Switch Low
P0453 Evaporative Emission System Pressure Sensor/Switch High
P0454 Evaporative Emission System Pressure Sensor/Switch Intermittent
P0455 Evaporative Emission System Leak Detected (large leak)
P0456 Evaporative Emission System Leak Detected (very small leak)
P0457 Evaporative Emission System Leak Detected (fuel cap loose/off)
P0458 Evaporative Emission System Purge Control Valve Circuit Low
P0459 Evaporative Emission System Purge Control Valve Circuit High
---
At least the cap isn't loose for the gas tank.

I would clear the code with an OBD-II Scanner 'erase code' button, and see how long it takes for it to come back.

Aug 06, 2010 | 1996 GMC Jimmy

2 Answers

HAVE A TROUBLESHOOTING MESSAGE PO446 ON A 2003 CHEVROLET SILVERADO 1500. CHECKED GAS CAP AND TIGHTNED NO CHANGE. AM LOOKING FOR LOCATION OF FOLLOWING PARTS PURGE OR VENT SOLENOID VAPOR CANISTER EVAP VENT...


DTC P0446 Evaporative Emission (EVAP) Vent System Performance

The vehicle control module (VCM) monitors the performance of the evaporative emission (EVAP) system by applying a predetermined level of vacuum to the EVAP system and monitors the vacuum decay rate. The VCM sets this diagnostic trouble code (DTC) if the vacuum decay rate is more than a predetermined value. The VCM monitors the amount of vacuum and the amount of pressure in the EVAP system by monitoring the fuel tank pressure sensor. For this DTC, the VCM turns ON both the EVAP purge valve and the EVAP vent valve when the Conditions for Running the DTC are met. This applies an engine vacuum to a closed EVAP system. The VCM turns OFF both the EVAP purge valve and the EVAP vent valve when the system reaches a correct amount of vacuum. The EVAP system should quickly RELEASE the vacuum in the EVAP system with the EVAP purge valve OFF and the EVAP vent valve OFF (open). This test indicates a blocked or restricted EVAP vent path if the EVAP system fails to release the vacuum quickly enough.

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Dec 02, 2008 | 2000 Chevrolet Silverado 1500

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