The check engine light, an integral part of a vehicle’s onboard diagnostics system, serves as an early warning signal that something is amiss with your car. While it might not always signify a major emergency, it’s important not to ignore this light as it can indicate a range of issues, some of which can lead to more serious problems if left unchecked in Belleville, IL. Here’s a look at some common reasons why the check engine light might turn on.
Oxygen Sensor Failure
One of the most frequent triggers for the check engine light is a faulty oxygen sensor. This sensor measures the amount of unburnt oxygen in the vehicle’s exhaust system. If it’s not working properly, it can cause the car to burn fuel inefficiently, increase emissions, and reduce mileage. Ignoring a faulty oxygen sensor can lead to a damaged catalytic converter, which is much more costly to replace.
Loose or Faulty Gas Cap
Sometimes the simplest issues can trigger the check engine light in Belleville, IL, such as a loose, damaged, or missing gas cap. The gas cap seals the fuel system and maintains pressure within the fuel tank. A loose gas cap allows fuel vapors to escape and can reduce fuel efficiency and increase emissions. Tightening the cap or replacing it if it’s faulty typically solves the problem.
Catalytic Converter Failure
The catalytic converter helps protect the environment by reducing harmful emissions from exhaust gases. Failure is often related to neglecting other maintenance such as the oxygen sensor or spark plugs. Symptoms of a failing catalytic converter include reduced performance and fuel economy, and the car might run at a higher temperature. Replacing a catalytic converter can be expensive, so it’s best to address any issues that could lead to its failure early on.
Faulty Mass Airflow Sensor
The mass airflow (MAF) sensor measures the amount of air entering the engine to determine how much fuel is needed to run the engine efficiently. A faulty MAF sensor can result in a decrease in fuel efficiency, stalling, and rough idling. Keeping your air filter clean can help prevent this issue, but sometimes the sensor itself will need to be replaced.
Spark Plugs or Wire Issues
Worn or fouled spark plugs, or faulty spark plug wires, can cause the engine to misfire, reducing its efficiency and triggering the check engine light. Regularly replacing spark plugs and wires is a key part of vehicle maintenance that can prevent more serious issues.
Ignition Coil Problems
Ignition coils, which generate the electricity for the spark plugs, can fail due to high operating temperatures or voltage overload. If an ignition coil fails, it will result in poor performance, decreased power, and an active check engine light. Regular inspections and replacing old coils can prevent these problems.
Exhaust Gas Recirculation Valve (EGR) Issues
The EGR valve helps reduce nitrogen oxide emissions and prevent engine knock by recirculating a portion of an engine’s exhaust gas back to the engine cylinders. If the EGR valve becomes clogged or malfunctions, it can lead to engine performance issues, increased emissions, and the illumination of the check engine light.
Rowan Tire & Auto Service is the company to call to have your vehicle inspected if your check engine light is on near Belleville, IL.
