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Go Back   Hummer Forums by Elcova > Hummer H3 Discussion Forums > Technical Discussion and Customizing your H3

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  #1  
Old 10-15-2013, 06:39 PM
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Angry Check engine with DTC 0449

Anyone change out the valve to resolve diagnostic trouble code (DTC 0449)?
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  #2  
Old 10-16-2013, 01:07 AM
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Default Re: Check engine with DTC 0449

First check the CNSTR VENT fuse in the underhood fuse block. If you have access to a scanner command vent solenoid on and check for power and ground to vent solenoid, if ok plug it back in and command it on and off listen for it clicking. If does not click replace evap vent valve.
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Old 10-16-2013, 07:55 PM
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Default Re: Check engine with DTC 0449

Thanks will check....
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  #4  
Old 10-17-2013, 11:47 PM
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Default Re: Check engine with DTC 0449

This link was very helpful for my 06 H3...
http://www.dragtimes.com/video-viewe...55eeIM&feature
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