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P0496 code

 
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blacknome
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Joined: Apr 24, 2006
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Location: Toronto Canada

2003 Chevrolet Impala
2003 Chevrolet Astro
1984 Chevrolet Monte Carlo


PostPosted: Mon Aug 22, 2011 4:34 pm    Post subject:  P0496 code Reply with quote

Evaporative Emissions Systems leak

- I replaced the gas cap
( still sets a code )
- replaced the canister purge valve ( under the filler door behind the wheel )
( still sets a code )

- how do I test the fuel tank pressure sensor ( and where is it )

- Is there another selenoid under the hood ??

I clear the code and sometimes it comes back within 10 mins of driving, other times immediately after the car is started.

Any ideas ??
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04ImpalaSS
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Joined: Oct 07, 2008
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2004 Chevrolet Impala


PostPosted: Wed Nov 23, 2011 6:20 pm    Post subject:   Reply with quote

There is one behind the Throttle body and intake tubing, at least there is on my 3.8 S/C...its the EGR Valve/Solenoid it cost about $100 to replace and Im actually leaving work here soon and I'm picking one up on my way home because I haven't been getting a P0496 but I've been getting a P0455 and there both dealing with the Evap system, and I took the time to respond because my check engine light will come back on too after I reset it..

When your check engine light is on, if you floor it (W.O.T) does it sputter and choke at high RPM's? and has your gas mileage gotten horrible? Im talking like 10mpg because that's what I'm getting for combined driving and lastly are you getting a ridiclious amount of knock?
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