No way to know how much it will cost to fix it until you know what is wrong with it. Testing is required.
Use this link to find some shops near you that can help with your concern:
www.repairpal.com/repair-shops
RepairPal Certified shops can diagnose and repair your 2017 Dodge Grand Caravan. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.