Question about 2009 Toyota Corolla

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I had blinking vsc code and check engin light on. Took it to a dealer who ran diagnotic. Dealer said gas cap has failed and new charcoal canister is needed. Since the high cost of latter, I simply replaced gas cap only and warning lights remained off. now, 4 months later lights came back on. Am I going to have to replace gas caps every couple of months? If I buy a new cap and put it on myself does the warning lights go off by themselves it this is the correct fix or do they need to be reset by a tech?

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  • Toyota Master
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Don't worry about that light, if performance and fuel economy is good. The light is still a fault from the evaporative canister.. It should not affect performance. Just make sure the fuel cap is snug. Just perform The ODBII scan periodically to catch any future problems. The vacume diaphragm for canister purge should be unplugged and the vacume hose plugged. This will avoid engine from sucking fuel into the engine due to a ruptured diaphragm in the canister

Posted on May 19, 2017

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Posted on Jan 02, 2017

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SOURCE: p0446 obd2 code 2004 camry

We had the same problem and the agency just re-adjusted and we have no more problems just the real ones.

Posted on Sep 29, 2008

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SOURCE: p0441

i would have the front vacuume switching vavle checked

Posted on Apr 18, 2009

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SOURCE: Check engine light comes on if gas cap is loose

replace the gas cap .. clean the gas filler pipe where it seals against the gas cap .. .. even a small crack in the rubber seal will trigger the check engine light ..

Posted on Jul 02, 2009

  • 19 Answers

SOURCE: toyota seinna po440, po441, po446

you have to understand that there is a leak in the system other than the gas cap for the evaporative system. The system needs to be professionally closed, and smoke introduced into to find the leak, and a through component check, eg.. purge valve vapor canister vent solenoid all functioning correctly

Posted on Sep 01, 2009

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SOURCE: toyota Rav4 D4D 2006,warning lights check

okay.how would the injectors have anything to do with the vehicle stability control/4wd.??if it were injectors at such a low mileage you would feel a real lack of power.now as toyota own diahatsu you could save yourself a fortune if you ask them to diagnose a fault!!to check vsc is working put car in 2nd and floor the pedal turning as tight a circle you can brave.it should stop the inside wheels from screaming....to check 4wd do the same and you will feel the car trying to pull itself apart.you will see what i mean.!!!

Posted on Mar 09, 2010

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I went to an auto parts store 'cause my check engine light and vsc light came on, on my 2006 Toyota Avalon-Touring. I bought a new gas cap a couple days ago. The light is still on.
You may have a loose hose in the evap system.
see the diagram below. The evap purge valve is on top of the engine as indicated. There should be a small diameter hose connected there. That hose runs under the car all the way to the charcoal canister, which is on top of the fuel tank. Check the hose for damage. If you can, check to see if it is connected to the canister and check the canister for damage as well.

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Aug 15, 2017 | Toyota Avalon Cars & Trucks

1 Answer

I really need help with this problem. I have a check engine light with code p0441 after having a p0446 now i have already switched the vsv valve, and the charcoal canister they are brand new and have...
Have you tried replacing the gas cap with an OEM part?

Oct 02, 2013 | 1999 Toyota Camry

2 Answers

Circuit fault 2000 camry P0446
P0446, This is a EVAP code,check the gas cap is the seal torn?Do you tighten the gas cap properly,If there is a circuit problem this will reside in the CCV (canister closed valve),VSV (pressure switching valve),or a disconnected hose at the charcoal canister,if anything just replace the gas cap first,clear the code and go from there

Aug 11, 2012 | Cars & Trucks

1 Answer

2006 Avalon Limited with 40,500 miles. Like new. Seatbelt was closed in the driver side door and batter was drained. I charged the battery and everything seemed ok. The following fault codes are now...
Yea VSC lite will come on when ever a check engine lite is On, the codes you mentioned are certainly a EVAP codes, make sure your gas cap is a factory and inspect seal surface and contac surface on filler neck for rust clean if any,also check all hoses going into air box reconect if necesary, (have your car been in any accident) if have access to a scan tool resest lite if lite comes back no other option take it to a dealer, check for warranty coverage on this systems.
good luck

Feb 12, 2011 | 2007 Toyota Avalon

2 Answers

The check engine light on my 2004 nissan pathfinder keeps going on. I have had it fixed once for $500. What could be the problem and how can I avoid another costly repair?
Try taking off your gas cap and installing it again. This can do the trick sometimes. If not you will have to go purchase a reader and see what code it comes up with.

Aug 17, 2010 | 2001 Nissan Pathfinder

1 Answer

Check engine light came on, ran codes and got miss fire on #6 hole. changed plugs and cleared code, light came on again. ran codes and came up with P0440 evap. checked lines and found no defect. cleared...
Would guess that canister would be dealer only but never hurts to check the local parts store.Could also check online parts store.They say this problem comes from topping of your tank.When fueling and the pump shuts off you are not to put any more in.Just a thought.

Feb 02, 2010 | Buick Regal Cars & Trucks

3 Answers

My 2006 scion xb vsc,traction, and check engine light just came on what is the problem please help quick
I had the same problem. The cause (at least on my box) was a bad charcoal canister and the valve going to it. These go bad on the boxes fairly often. If you "top off" your tank, the overflow spills down into the charcoal canister and it will not function properly. IE: Engine, Trac, and VSC lights come on. It doesnt hurt it to drive with a bad canister, but you will lose mileage and that light will be staring you in the face every time you drive. The parts are pricey, dealer only parts and the canister is about $400. I found a totalled xb with a good canister and nabbed it for $40.....solved my problem. Hope this helps!

Jan 03, 2010 | 2006 Scion xB

1 Answer

2001 toyota 4runner< engine light on, code comes out to be - p0441 auto zone said change gas cap, i did, 2 weeks later light comes on again< what do you think?
You can get this code if you don't tighten the gas cap all the way, or the gas cap is bad. I will put all the detail for the code below and what I would do to fix the problem...

NOTE: Do not top off your tank either. This could cause the 'overfill check valve' to fail, and could cause this code.

Definition of P0441: Evaporative Emission Control System Incorrect
Purge Flow

Detection logic:
DTCs P0441 and P0446 are recorded by the ECM when evaporative emissions leak from the emissions components
or when there is a malfunction in either the VSV for EVAP, the VSV for
pressure switching valve, or in the vapor pressure sensor itself.
detection cause: Pressure in charcoal canister and fuel tank does not drop or
drop in pressure increased beyond the specified limit during
purge control (2 trip detection logic)

What I would do:
1. Replace fuel cap and reset computer. If code returns, then proceed to next

The next steps require a diagram, so the purchase of service manual to locate the components is very helpful

2. Check for vacuum leaks in ALL emission hoses
3. Check VSV valve operation (there are three; they are ~$75 new from dealer, and sometimes fail)
4. Check for cracks or leaks around or in the charcoal canister (usually requires a smoke machine)
5. check for voltage to VSV's
6. Last resort: take it to the dealer and have them run a diagnosis. This should run between $50-$100.

Good luck!

-Chris

Dec 11, 2009 | 2001 Toyota 4Runner

2 Answers

2002 toyota 4runner with the engine,vsc off,vsc trac lights on
NEED TO HAVE COMPUTER CHECK FIND WHAT CODE MADE THE ENGINE KLIGHT COME ON.. AND HAVE IT FIXED,, VSC LIGHTS COME ON BECAUSE THE COMPUTER DEACTIVATES THE VSC AS A SAFETY FEATURE WHEN CK ENGINE LIGHT IS ON

Jul 30, 2009 | 2002 Toyota 4Runner

2 Answers

2004 toyota sienna engine and vsc light
well the check engine light on can mean many different issues its just a symbol telling you that your ecu (engine computer) has found an issue with your vehicle it is not a specific indicator of whats going on unless you get the codes pulled from your computer any autozone will pull the codes for free and some shops will also just call around they will not diagnose prob for free though it could be anything vacume leaks - o2 sensor bad ext....as far as your vsc being on most of the time when your check engine light comes on the vsc will light up also does not mean there is an issue with your vsc system....i work as a mechanic for a toyota dealer and see his all the time and check to make sure your gas cap is tight will set check eng and i see it all the time when custs forget to tighhten gas cap if its loose you can get the codes erased hope this helps!!!!

Jan 04, 2009 | 2004 Toyota Sienna

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I went to an auto parts store 'cause my check engine light and vsc light came on, on my 2006 Toyota Avalon-Touring. I bought a new gas cap a couple days ago. The light is still on.

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