While an illuminated check engine light doesn’t necessarily mean that your engine is about to totally fail, you’ll still want to visit the shop for diagnostics. This will give you the best chance to identify and address the issue before it worsens and costs more to fix. At Auto-Lab Complete Car Care Center, our local mechanics provide expert check engine light diagnostics and repair in the greater Plymouth, MI area. Here are five common reasons the check engine light comes on.

Faulty Oxygen Sensor

One of the most common reasons for the check engine light to illuminate is a malfunctioning oxygen sensor. These sensors monitor the level of oxygen in the exhaust gasses, helping the engine control module adjust the air-fuel mixture for optimal combustion. A faulty sensor can lead to reduced fuel efficiency and increased emissions.

Loose or Damaged Gas Cap

It might sound bizarre, but a loose or damaged gas cap is a common trigger for the check engine light. The gas cap helps maintain the pressure in the fuel system. If it's not properly sealed, it can lead to fuel vapors escaping and triggering the light. 

Catalytic Converter Issues

The catalytic converter plays a crucial role in reducing harmful emissions by converting pollutants into less harmful substances. If it malfunctions, the check engine light may come on. 

Malfunctioning Mass Airflow Sensor

The mass airflow sensor measures the amount of air entering the engine, helping to determine the appropriate fuel injection. When this sensor malfunctions, it can disrupt the air-fuel mixture, leading to issues such as poor fuel efficiency and rough idling.

Ignition System Problems

Problems within the ignition system, such as malfunctioning spark plugs or ignition coils, can trigger the check engine light. Ignition issues can result in poor engine performance, reduced fuel efficiency, and even engine misfires. 

Check Engine Light Repair in Plymouth, MI

When you need auto repair in Plymouth, MI and the surrounding area, contact Auto-Lab Complete Car Care Center at (734) 404-7625. At our local auto shop, we can expertly address your vehicle’s repair and maintenance needs. Feel free to give us a call today to make an appointment!