malfunction indicator lamp came on my 2005 toyota corolla ce
a month ago had it serviced and the serpentine belt was replaced but not the tensioner pulley which they said was starting to loose adjustment. Told me if it started to squeal I would need the replace it but it has not. 288,278 kilometres at service date. Should I drive my car with the light on or do I need to take it in to the dealership and if I do can I drive it in.