What Happens If a Vehicle Fails the Automatic Exhaust Emission Test on the Road?

[VanIsabel]

Failing the automatic exhaust emission test on the road may indicate poor atomization of the fuel injector. Below are some details about failing the automatic exhaust emission test on the road: 1. Cylinder wear: This condition involves excessive carbon deposits and tar buildup, as well as failure of the three-way catalytic converter and oxygen sensor. Check the air filter, spark plugs, intake air temperature sensor, and intake manifold pressure sensor. Add dual-core friction-reducing repair agents and high-efficiency cleaners. If these measures are ineffective, use a three-way catalytic converter cleaner to clean the catalytic converter. Possible causes include insufficient oxygen supply in the intake system, cylinder wear, and carbon deposits inside the cylinder. 2. Solution: The three-way catalytic converter and front oxygen sensor may be affected. Incomplete combustion of the engine's air-fuel mixture can lead to significant carbon deposits. Therefore, cleaning the three-way catalytic converter and oxygen sensor can resolve many issues related to failed exhaust emission tests. If the fuel quality is poor, sulfur, lead, or phosphorus in the fuel can cause poisoning of the three-way catalytic converter, leading to its failure.

[LaKhloe]

Last time I was driving on the highway, the emissions checkpoint scanned my car and immediately flashed a red light, directing me to pull over. The officer checked my license and said my emissions exceeded the limit, issuing a 200-yuan fine and requiring me to get the car repaired and re-inspected at a designated auto shop within 15 days. Otherwise, my car would be towed, and I might even get penalty points. I panicked and quickly found a repair shop for an inspection—turns out the catalytic converter was broken, costing me several hundred yuan to fix. After passing the re-inspection, I had to make an extra trip to submit the re-inspection certificate. This whole ordeal was such a hassle—wasting time and money—so now I make sure to get my car serviced every six months to keep emissions in check and avoid getting flagged again. A friendly reminder to everyone: check your exhaust system before hitting the road to avoid unexpected fines and headaches.

[GideonLynn]

As someone who frequently pays attention to environmental protection, I believe roadside emissions testing is quite important. If a vehicle fails the test, it means its emissions exceed standards and pollute the air, leading to being pulled over and penalized, typically with a fine ranging from one to two hundred yuan. What's more troublesome is that mandatory repairs must be completed within a set period—for example, fixing the exhaust system and passing a retest within ten days before the car can be driven again. Otherwise, the police may immobilize or even impound the vehicle until the issue is resolved. This actually encourages car owners to perform timely maintenance and reduce air pollution. I've seen many vehicles emitting black smoke that, after being inspected, were fixed with simple repairs like an oil change or engine tune-up. In the long run, this benefits the environment by reducing PM2.5 levels. Car owners should remember to regularly check their exhaust filters and not wait until problems arise to regret the health impacts.

[JadeLee]

From a technical perspective, when an automatic inspection point uses infrared to scan exhaust gases and detects excessive nitrogen oxides, it indicates incomplete engine combustion, commonly due to faulty oxygen sensors or spark plugs. This results in an on-the-spot fine and mandatory repairs, followed by a visit to the repair shop for adjustments and retesting. If the issue persists, the vehicle may be banned from the road. I recommend checking the air filter immediately upon detecting any problems to prevent minor issues from escalating into costly repairs, saving both money and time.