How to Solve the Issue of the Exhaust Monitoring System Warning Light Being On?
1 Answers
The exhaust monitoring system light will illuminate when the ignition is turned on and must go off after the engine is started. If the light does not turn off after starting the engine or if it comes on or flashes while driving, it indicates potential unstable operation in the emission control system and excessive exhaust emissions. The solution is to use higher-quality gasoline or have the vehicle inspected at a 4S shop. The reasons for the exhaust monitoring system warning light being on are as follows: 1. Sensor Issues: The sensors mentioned here include the coolant temperature sensor, crankshaft position sensor, air flow sensor, intake air temperature sensor, oxygen sensor, etc. When these sensors are damaged, have poor contact, or experience signal interruptions, the vehicle's ECU cannot accurately obtain engine data, which can cause the engine warning light to illuminate. 2. Fuel or Oil Quality Issues: The quality of fuel and oil is crucial here. The fuel used in cars usually has a specific octane rating, and engine oil can be semi-synthetic or fully synthetic. Manufacturers generally recommend which type of fuel and oil to use. If the owner does not follow these recommendations, it can lead to engine wear over time. 4. Poor Combustion of Air-Fuel Mixture: Faulty spark plugs, ignition coils, fuel pump, or clogged fuel lines can all cause poor combustion of the air-fuel mixture in the engine. 5. Air Intake Issues: Combustion in the engine requires proper air intake, and the air filter plays a critical role in this process. If the car's air filter is dirty and not cleaned regularly, it can affect the engine's air intake and eventually lead to blockages.
