What are the tips for vehicle exhaust emission testing?

[VivianLynn]

You can clean the three-way catalytic converter and oxygen sensor in advance, clean or replace the spark plugs, and perform a deep cleaning of the engine. This can increase the pass rate. Keep the vehicle clean and tidy: To leave a good first impression on the inspector, it is recommended to clean the vehicle as much as possible before the inspection, giving it a brand-new appearance. Minor scratches on the vehicle will also be less noticeable, making it easier for the inspector to pass it. Handle all traffic violations: If there are unresolved traffic violations on your vehicle, the staff will not proceed with the annual inspection, causing significant delays. Make sure to resolve all violations before the inspection. Prepare the necessary items to bring: Before the inspection, prepare the vehicle registration certificate, compulsory traffic insurance policy, driver's ID card, as well as essential items such as a fire extinguisher, warning triangle, reflective vest, and other emergency supplies. If these items are not prepared, you will need to purchase them at designated locations.