Why would indicator light#13 come on my dash and stay on causing a rough idle. on 2003 Volkswagen Passat

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
It occurred today causing the car to shut down when it comes to complete stop. And when you start the car up the idle goes up and down nonstop
(1) Answer
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you would have to scan the computor for codes we can do that for you for number is 631-422-4010 stacks auto thank you tom