Why is the engine light on in my 2008 jeep grand Cherokee laredo

Hello, the lack of coolant is not in and of itself enough to set a check engine warning light on. However, a lack of coolant could contribute to damage to some engine component that could indeed turn on that light to warn you of a problem. The oil change required is probably legitimate; miles is not the only thing monitored to determine the need for a change. Get the Jeep looked at by a trained skilled technician who can retrieve any set diagnostic trouble codes and determine by those codes a path to troubleshooting your concerns. I would not continue to drive until this is resolved; a problem could be worsening and could cause further issues. https://repairpal.com/auto-repair-near-me Click the link or call us at 877-913-1554. We'll gladly find you a certified RepairPal shop in your area.