What are the signs of carbon monoxide poisoning ? i have frequent headaches and tire easily sometimes. can my car leak carbon monoxide fumes inside?

Headache etc: Symptoms of mild acute poisoning include lightheadedness, confusion, headaches, vertigo, and flu-like effects; larger exposures can lead to significant toxicity of the central nervous system and heart, and even death. Following acute poisoning, long-term sequelae often occur.

Yes, risk is present: You may experience headaches only while in your car, your fingertips may turn cherry red, you might be spacey, light-headed, dizzy, nauseated, and if so, could be carbon monoxide exposure. So, if you have an older car, and visible exhaust with a lot of wear and tear, best to have it checked. Also, at home, always have place carbon monoxide detector, as furnaces have potential for harm.