wont pass smog in Las Vegas its evac sensor and camshaft sensor? More info? on 1998 Pontiac Grand Am

Will not pass smog keeps code is for evac sensor and camshaft sensor? What do I do? And how much will it cost? Very important to get done so everything is in running shape. Help?

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1 answer
no telling on cost until diag is done,it could be the sensors or the circuit