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What is your question?
got an O2 sensor changed out, had an evap canister replacement, and had Auto-Zone check the light for codes and both they and the Tires Plus guy get the P1447 code, but the Tires Plus guy also got a Manufacturers code I can't remeber and now it only shows the above code what gives and what idoes the P1447 code mean?
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P1447 is a fault in the voltage from evaporative emission system pressure sensor. These cars have problems with canister failure that allows debris from the canister to migrate around the whole evap system causing purge valves to stick. If every thing appears to test OK I have read on Nissan car forums of people complaining of wiring harness problems.