The check engine light is one of the most recognizable warning signals on your vehicle’s dashboard. While it may not always seem urgent, it indicates that your car’s onboard diagnostic system has detected an issue that requires attention. Ignoring the light can lead to decreased performance, lower fuel-efficiency, or increasingly expensive repairs. At Lee Hill Auto Service, we provide expert check engine light diagnostics and repair in the greater Fredericksburg, VA area. Here’s a look at four common check engine light triggers. 

Oxygen Sensor Malfunction

The oxygen sensor measures the amount of oxygen in the exhaust gases and helps the engine control module adjust the air-fuel mixture for optimal performance. A faulty sensor can cause the engine to run too rich or too lean, leading to poor fuel-economy and increased emissions. If the check engine light is illuminated due to an oxygen sensor problem, replacing the sensor is usually necessary to restore proper engine function.

Mass Air Flow Sensor Issues

The mass air flow (MAF) sensor monitors the volume of air entering the engine. A malfunctioning MAF sensor can disrupt the air-fuel balance, causing rough idling, stalling, or reduced acceleration. Replacing the sensor often resolves the problem and helps the engine run efficiently again.

Spark Plug or Ignition Coil Problems

Spark plugs and ignition coils are critical for igniting the air-fuel mixture in the engine. Worn or faulty spark plugs, as well as failing ignition coils, can cause misfires that trigger the check engine light. Symptoms may include rough running, difficulty starting, or decreased power. Regular maintenance and timely replacement of these components are essential.

Catalytic Converter Trouble

The catalytic converter reduces harmful emissions from your vehicle’s exhaust. A failing converter can trigger the check engine light and may lead to poor engine performance or unusual exhaust smells. Addressing catalytic converter issues promptly is important, as ignoring them can cause more serious problems with the engine.

Check Engine Light Repair in Fredericksburg, VA

When you need auto repair in Fredericksburg, VA and the surrounding area, contact Lee Hill Auto Service at 540-824-3730. At our local auto shop, we can expertly handle your vehicle’s repair and maintenance needs. Feel free to give us a call to schedule an appointment for car care in greater Fredericksburg, VA!