human
I have been having trouble with my car's engine. What are the signs and how can I fix them?
assistant
The first sign that your engine may be in trouble is when it starts making strange noises or vibrations. If you hear a knocking sound coming from under the hood, this could indicate an issue with the engine. Other warning signs include reduced power output, smoke coming from the engine, or an unusual smell coming from the exhaust system. To diagnose the problem, you should take your car to a qualified mechanic who will check the engine for any potential issues.