Carbon Monoxide Gas
The engine exhaust from this vehicle contains carbon monoxide, a colorless, odorless, and highly toxic gas. As long as you properly maintain your vehicle, carbon monoxide gas will not get into the interior.
Have the exhaust system inspected for leaks whenever
When you operate a vehicle with the trunk open, airflow can pull exhaust gas into the interior and create a hazardous condition. If you must drive with the trunk open, open all the windows and set the heating system*/climate control system* as shown below.
1. Select the fresh air mode.
2. Select the mode.
3. Set the fan speed to high.
4. Set the temperature control to a comfortable setting.
Adjust the heating system*/climate control system* in the same manner if you sit in your parked vehicle with the engine running.
Carbon Monoxide Gas
WARNING
Carbon monoxide gas is toxic.
Breathing it can cause unconsciousness and even kill you.
Avoid any enclosed areas or activities that expose you to carbon monoxide.
An enclosed area such as a garage can quickly fill up with carbon monoxide gas.
Do not run the engine with the garage door closed.
Even when the garage door is open, drive out of the garage immediately after starting the engine.
Honda Civic Service Manual. Headlight Adjustment ('12-'13, '14: 4-door)
1.
Headlight - Adjustment
Headlights become very hot during use; do not touch them or any attaching
hardware immediately after they have been turned off.
Before adjusting the headlights:
...