4 Common Check Engine Light Issues
Seeing the check engine light illuminate on your dashboard can be unsettling. While the light doesn’t always signal a major problem, it should never be ignored. The check engine system is designed to alert you to issues that affect performance, emissions, and engine safety. At Continental Motors, we provide expert check engine light diagnostics and repair in the greater Greensboro area. Here are four common reasons your check engine light may come on.
Faulty Oxygen Sensor
One of the most common triggers for the check engine light is a failing oxygen sensor. This component monitors the level of unburned oxygen in the exhaust and helps control the engine’s fuel-to-air ratio. If the sensor is malfunctioning, your car may burn fuel less efficiently, leading to decreased gas mileage and increased emissions. Continuing to drive with a faulty oxygen sensor can eventually damage the catalytic converter, so it’s best to have it checked as soon as possible.
Failing Catalytic Converter
The catalytic converter plays a crucial role in reducing harmful emissions. When it starts to fail, the engine becomes less efficient, emissions increase, and fuel-economy drops. A failing converter can cause the check engine light to illuminate along with symptoms such as sluggish acceleration or a rotten-egg smell.
Mass Airflow Sensor Problems
The mass airflow (MAF) sensor measures how much air is entering the engine, helping the engine control module determine the proper amount of fuel to inject. A failing MAF sensor can cause poor fuel-economy, and rough idling. When the computer detects irregularities, it activates the check engine light. Replacing the sensor typically resolves the issue.
Bad Spark Plugs or Ignition Coils
Spark plugs and ignition coils are responsible for igniting the air-fuel mixture in the engine. If either component begins to fail, the engine may misfire, run rough, or struggle to accelerate. These issues often trigger the check engine light. Regular maintenance, including spark plug replacement at recommended intervals, can help prevent ignition-related problems and keep your engine running smoothly.
Check Engine Light Diagnostics & Repair in Greensboro, NC
For expert engine diagnostics and repair in Greensboro and the surrounding area, contact Continental Motors at (336) 920-3794. Feel free to give us a call to make an appointment for car care in greater Greensboro, NC!













