Is your Lexus emitting thick smoke from the exhaust pipe, or is the check engine light on? Lexus cars are typically associated with reliability and fuel economy, but occasionally, emission systems may pose a problem. The emission control system in your Lexus is intended to reduce the quantity of hazardous pollutants emitted to the environment. It operates by regulating the emission of fuel combustion products before they are expelled out of the exhaust. The major subsystems of the system are the catalytic converter, the oxygen sensors, the exhaust gas recirculation (EGR) valve, and the evaporative emission control system (EVAP). These parts all have their functions, and if one is bad, it will affect the operation of the others, and performance will be poor and emissions high.
Possible Causes Of Emission System Failure
- Malfunctioning EGR Valve: To help decrease nitrogen oxide emissions, the EGR valve relays part of the exhaust gases back into the engine. If stuck or clogged, it can result in performance problems and high pollution levels.
- Leaking EVAP System: The EVAP system helps store fuel vapors and does not allow them to enter the atmosphere. A leakage in this system causes warning lights and high emission rates.
- Old or Contaminated Fuel: Contaminated fuel may be low-quality or stale fuel, which, when introduced, clogs the system and reduces efficiency.
How to Fix Emission System Problems
- Identify Symptoms of Emission System Problems: Emission system problems are normally indicated by the check engine light or specific emission codes. Other symptoms are reduced fuel economy, rough running when idle, noticeable misfires, and even poor performance on emission checks. These are some of the signs that should be identified to diagnose and fix this problem.
- Perform a Diagnostic Test: Using an OBD-II scanner, you can determine the root cause of the issue. The scanner pulls error codes that point to particular problems, such as oxygen sensors, EGR valves, catalytic converters, or EVAP system leaks. The right diagnosis leads to the correct and efficient resolution of the problem.
- Inspect and Address Common Causes: After the diagnostic test has isolated the problem, physically examine the emission system parts for any signs of problem, deterioration, or rust. They include a bad oxygen sensor, a blocked catalytic converter, or damaged hoses. Most of the time, the problem can be fixed by fixing or replacing the bad component.
- Replace Faulty Components: If an oxygen sensor, catalytic converter, or EVAP system part is found to be bad, it needs to be replaced. These parts are replaced with high-quality, genuine OEM emission components to make the emission systems function as intended and maintain your car’s performance.
- Repair Leaks in the System: Any cracks in the exhaust manifold or other emission control parts, such as vacuum hoses or the EVAP system, will have a huge impact on the emission system. Look for cracks and pipe joint failure and use seals, gaskets, or replacement components to ensure that the system is leak-proof and functions optimally.
- Reset the ECU: In some cases, after the faulty components have been changed or the emission system has been repaired, the vehicle’s Engine Control Unit (ECU) may need to be reset. This enables the system to balance and check the new components with the right efficiency. A diagnostic scanner can clear the ECU and erase any error codes saved.
Get Expert Repairs At European Motor Cars
For all your emission system repairs, let 
the experienced technicians at European Motor Cars in Las Vegas, NV, handle your vehicle. We have worked for many years servicing and repairing luxury car brands like Lexus, and our technicians can solve any problem the car might be experiencing.
Whether you need help with a check engine light that just won’t go away or your car has failed an emissions test, European Motor Cars has got you covered with the latest and most effective diagnostic equipment and the best quality parts. Located in Las Vegas, the workshop is always glad to welcome drivers from nearby districts, such as Summerlin and Spring Valley. Do not allow the emission system problems to reduce the performance of your Lexus or even cause you stress. Call now to book your appointment and leave your car in the hands of professionals.