How to Solve Exceeding Emission Standards Level 5 and Level 7?

[OAnthony]

It is necessary to read the original fault codes for analysis to check if there are any fault codes indicating pressure build-up failure. If present, these fault codes should be addressed first. Check if poor-quality urea has caused crystallization and blockage of the filter screen at the urea pump's connector. In addition to replacing with qualified diesel, a comprehensive vehicle inspection should be performed.

[DelGideon]

Last time my car failed the emissions test, it took me a while to fix it. Generally, excessive emissions usually refer to high levels of CO or NOx in the exhaust, which could be due to carbon buildup or aging spark plugs. It's best to replace the spark plugs first, then check if the air filter is clogged—clean or replace it if necessary. Faulty oxygen sensors are also common; you can buy a universal one online and replace it yourself or have a small shop do it. If cleaning doesn't work, the catalytic converter might be clogged, in which case you'll have to replace it—though it's expensive, so I recommend getting it checked at a professional repair shop first. To prevent issues, use higher-grade gasoline with additives to clean the system, avoid short trips, and drive on highways regularly to allow self-cleaning. Ignoring excessive emissions not only means failing the annual inspection but also increases fuel consumption and pollutes the environment. Now, I stick to servicing my car every 5,000 kilometers for better preventive maintenance.

[StKeira]

I've encountered the issue of excessive emissions several times as an enthusiast who frequently works on my own car. When dealing with excessive emissions, start with the basics: check if the spark plugs are eroded and replace them promptly, and clean or replace the air filter if it's dirty. Then, try using fuel additives for a few tanks of gas to improve combustion efficiency. If the indicators still show excessive emissions, it might be due to a failed catalytic converter or a faulty oxygen sensor. DIY removal and installation can be a bit troublesome, so it's best to seek help from an experienced mechanic. The cost isn't high, ranging from tens to a few hundred dollars to fix. Don't delay until it becomes severe, costing more money and effort. Excessive emissions affect driving smoothness and increase fuel consumption. Regular maintenance, such as cleaning key engine components every 10,000 kilometers, can prevent problems. Environmentally, reducing tailpipe pollution benefits everyone.

[LeChloe]

Young car enthusiasts who modify their vehicles often find emission exceedance quite annoying. I use an OBD scanner to check for trouble codes, like NOx limits, and then troubleshoot the cause. Don't slack on regularly replacing spark plugs and air filters. Fuel system cleaners can be effective; if the catalytic converter is clogged, try a cleaning solution before replacing it. Exceeding limits affects annual inspections, so repairs should be prioritized. For prevention, using high-quality fuel and driving smoothly can reduce carbon buildup, which is also better for the environment by cutting emissions. Most cases can be resolved with simple DIY fixes.