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Old 05-12-2015, 05:18 PM   #1
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Default 2002 Bonneville P0440 code

My Bonneville has been such a good car, I haven't had to chase many SES codes. (Only 2 in 318K miles)
In other words, I'm pleading stupidity.
I saw a lot of posts for the P0440. One source said the most common cause is Evap purge solenoid. Where'* it at?

Thanks, Joe
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Old 05-12-2015, 06:17 PM   #2
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Old 05-13-2015, 09:18 AM   #3
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Actually, the gas cap is the most common problem......

With the purge solenoid, the usual problems are the vac lines to it, the harness to it(eaten by rodents), or the solenoid itself....
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