Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › 05 Honda Civic – Carbon Monoxide Inside the Car › Reply To: 05 Honda Civic – Carbon Monoxide Inside the Car February 14, 2021 at 9:03 am #988820 Richard KirshyParticipant Suggest you look for any black soot build up on all piping and connections from the exhaust manifolds to the tail pipe