Found a vac line off. Only have the pin 8 25 blink code that won’t stay off. I’ve had that code for about 2 years. Not sure what to do about it

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1993 e300
1995 e320
1994 e320
2006 s500 4matic
2004 Jeep wj overland
2001 Ducati 748
2004 Honda shadow aero