Question about 2000 Chevrolet Silverado 1500

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I have an 06 impala and just got a tighten gas cap light took it to chevy dealer and they say vent valve selenoid they replaced. what is this and where is it

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It's for the gas tank to breath...I think

Posted on Jul 17, 2009

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Replaced purge valve cannister & tube on 2009 chevy impala ss plus 10amp fuse, gas cap code is p0449; now the check engine light has not went out been 4 days since replace now what 2 do...help help


gas cap code p0449 ??? This is not a gas cap code ! DTC P0449: Evaporative Emission (EVAP) Vent Solenoid Control Circuit.. your best bet , take it to a qualified chevy repair shop .


Wells EVAP Training with Sgt Tech P0440 P0441 P0442 etc

Apr 12, 2017 | 2009 Chevrolet Impala

1 Answer

2013 Chevy Impala w/ 71,000 miles with engine light on. Diagnostic codes of P0442, P0455, P0496. Replaced gas cap with another factory gas cap.


Well you were on the right track, but there's more to the system than just the gas cap.
Code 442 is for a small leak, 455 is for a large leak, and 496 is for flow during non-purge. That last code means something was letting air flow in the venting system to the vapor canister when the system should have been closed.
It could be a purge valve or other component.
And it could still be under factory warranty.

Sep 30, 2015 | Cars & Trucks

1 Answer

I just bought a 2012 Chevy Impala. The gas cap never tightens. Is this normal?


Some gas caps have a built in slip preventing over tightening, so no engine light, no worry. The cap will feel like a ratchet effect when you tighten, so it slips at point it is sealed so you don't crush rubber seal. Not to worry as I see it.
CERACOAT-NANOTECH.com

Apr 21, 2015 | 2012 Chevrolet Impala LS Sedan 3.6L V6 FFV...

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How do you replace the vent valve in a 2001 chevrolet impala


check for vacumm leak check your your fuel cap sonetimes the gasket on the gas cap gets worn out

Apr 11, 2014 | 2001 Chevrolet Impala

1 Answer

2002 chevy blazer codes 443 449 i replaced the maf sensor the vaf sensor on air horn the emmision valve on the engine the vent valve to even tried the gas cap clear codes drove the truck guess what codes...


p0443 is evaporative emission control system, purge control curcuit malfunction, p0449 is emission control system, vent control curcuit malfunction. p0449 is often a filler cap problem on fuel tank. try tightening cap

May 20, 2010 | 2002 Chevrolet Blazer

3 Answers

I have 2000 chevy impala 3.4 engine i have check engine light with this code p0442 took it it to auto zone they said it was a small leak dont know where to start


This indicates a fuel vapor leak in the EVAP control system. It means a very small leak has been detected. In fact, the leak can be from a hole as small as 0.04" in diameter. The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine.
code P0442 most likely means one or more of the following has happened:
  • A loose or improperly affixed gas cap
  • A non-conforming gas cap (i.e. not factory/original brand)
  • A small leak/hole in a fuel vapor hose/tube
  • Other small leak in EVAP system
  • Faulty vent o-ring seal
With a P0442, the most common repair is to:
  • Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back.
  • Otherwise, replace the gas cap, or
  • Inspect the EVAP system for cuts/holes in tubes/hoses

Dec 31, 2009 | Chevrolet Impala Cars & Trucks

1 Answer

06 chevy impala v6 3.9 liter engine. Check engine


there is a large evaporative leak. keep away form ottozoo, they dont have the brain power to actually diagnose a light bulb., their job is to sell parts., if they sell you the wrong parts tough.Take it to a qualified repair shop that does a lot of GM work or the dealer.

Sep 25, 2009 | 2006 Chevrolet Impala

3 Answers

On a 2006 chevy impala it tells you to tighten the gas cap ,then when you do, we shut the car off. Then check engine light comes on. Where is the sensor located.


There is no sensor for a loose gas cap. What is happening is that the evaporative emission system is sensing a "Large Leak". Usually code p0455. The computer sees this as the most probable cause is a loose gas cap depending on several factors it looks at. You would need to clear the code(s) and see if that was the problem. If the light comes back on, then you have a problem in the system that will not let it seal. Possible solenoid problem, leaking hose / line, etc.

Mar 28, 2009 | 2006 Chevrolet Impala

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