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P0454 and P0449


mike33

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Hi Guys, haven't posted in a while. Hope everybody is doing well.

My 2008 DTS just started throwing these codes. Any suggestions on where to start with a repair?

Thanks! Mike

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Check for a bad vent solenoid. Check for a 10 amp fuse in the trunk that might be blown. Sorry I'm unsure what its labeled.

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The EVAP solenoid is going to be part of the canister....under the car...about where the rear drivers side seat butt position would be....the fuse block will be under the rear seat cushion.

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  • 2 weeks later...

Team, thanks for your help on this. I replaced the vent solenoid, and no check engine light for a week now. Quite a few ignition cycles. I used BWD part# CPV48 from O'reily. Hope this info helps someone again sometime.

Best Wishes, Mike

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