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The engine light won't go out. The codes indicate fuel system. I replaced the fuel cap, canister, purge control valve on canister, cut valve, cut bypass valve. Do you have to reset the system - if so can you disconnect the battery to do this?
Any other suggestions?
I didn't replace the sensor or water seperator and I can't find any problems with the hoses.
 

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I had the following codes

P1448 vent control valve
P0328 knock sensor
P0455 large evap leak

When I went to trouble shoot the P1448 code I disconnected my battery for about ~3 hours, and when I replaced the vent control valve, it's been off every since. Mind you it's only been 3 days, but I would try disconnecting the batter for a couple hours or find someone with and OBD II that can erase the code for you.
 
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