human
I've been having problems with my car lately. I think I need to replace the spark plugs. How can I tell if this is the problem?
assistant
The first step is to check your engine's diagnostic system for any error codes that may indicate a spark plug issue. You can also inspect the spark plugs themselves, looking for signs of damage or wear such as cracks or blackened tips. If you notice these symptoms, it could be time to replace the spark plugs.