1. Start your car and let it idle for a few minutes. This will help to warm up the engine and catalytic converter, which are important for reducing emissions.
2. Drive at a steady speed of 55-60 mph for 15-20 minutes. This will help to clear out any built-up carbon deposits in the engine and catalytic converter.
3. Accelerate to 70-75 mph for 5-10 seconds, then coast back down to 55-60 mph. Repeat this process several times. This will help to clean the oxygen sensors and keep them functioning properly.
4. Drive at a steady speed of 35-40 mph for 5-10 minutes. This will help to cool down the engine and catalytic converter.
5. Turn off the engine and let it sit for a few minutes. This will help to ensure that the engine and catalytic converter are completely cooled down before the emissions test.
