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Old 07-07-2008, 09:15 AM   #1 (permalink)
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Pontiac Sunfire Check engine light PO440

Hi everyone,

I got a call this morning from my wife on her way in to work.

Her check engine light came on, so she pulled over and called me. We just happened to have a Scangauge hooked up, so I told her how to scan for the error code.

It was PO440. I looked that up and found that it is "P0440 Evaporative Emission Control System Malfunction".

What does that mean? It doesn't sound too bad. Could it be as simple as a loose gas cap?

I would like to be able to fix this myself, instead of sending it to a shop, but I am not sure where to start.

Any suggestions?

Thanks,

-Ben

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Old 07-07-2008, 10:02 AM   #2 (permalink)
EV test pilot
 
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Join Date: Jan 2008
Location: Oconomowoc, WI, USA
Posts: 4,435

Electric Cycle - '81 Kawasaki KZ440
90 day: 334.6 mpg (US)

S10 - '95 Chevy S10
90 day: 30.48 mpg (US)

Electro-Metro - '96 Ben Nelson's "Electro-Metro"
90 day: 129.81 mpg (US)

The Wife's Car - Plug-in Prius - '04 Toyota Prius
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I just got an e-mail from my wife:

"Ben,

I checked the gas cap on my car and it was NOT screwed on all the way. I
screwed it back on and now that check light if OFF. yeah.

-Me"



Looks like it really WAS just the gas cap!
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Old 07-07-2008, 09:49 PM   #3 (permalink)
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I wonder what that would have cost if you had taken it to a shop. ;-)

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