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2003 Nissan Altima Sedan with engine code P1491, how to repair?

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2003 Nissan Altima Sedan with engine code P1491, how to repair? what does the code mean?

Vehicle: 2003 Nissan Altima

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You will have to check the EVAP system for broken or cracked hoses, before replacing anything 

If the EVAP canister is OK, and there are no other visual damage to the EVAP system (e.g. loose or broken hoses), replacing the vacuum cut valve bypass valve takes care of the problem.

read link below if you need more info

https://www.autocodes.com/p1491_2003_nissan_altima_sedan.html

OBDII Code P1491 2003 Nissan Altima Sedan - Vacuum Cut Valve Bypass Valve

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