Few things make drivers more anxious than seeing the check engine light glow on the dashboard. While it can indicate something minor, it may also warn of a more serious problem that needs immediate attention. Ignoring the light can lead to reduced performance, higher repair costs, and even serious engine damage. At Auto Repair Specialist, we provide expert check engine light diagnostics and repair in the greater San Rafael area. Here’s a look at four common check engine light triggers.

Faulty Oxygen Sensor

One of the most frequent causes of a check engine light is a failing oxygen sensor. This sensor monitors the amount of unburned oxygen in your vehicle’s exhaust system and helps regulate the air-to-fuel ratio for efficient combustion. When it goes bad, it can cause reduced fuel-efficiency and increased emissions. Replacing a faulty oxygen sensor promptly not only improves performance, but can also prevent damage to your catalytic converter.

Malfunctioning Catalytic Converter

The catalytic converter is an essential emissions control component that reduces harmful pollutants from your exhaust. Over time, it can become clogged or damaged. A failing catalytic converter can cause reduced power, poor fuel-economy, and increased emissions.

Failing Ignition Coils or Spark Plugs

Your ignition system plays a key role in powering your vehicle by igniting the air-fuel mixture inside the engine. If spark plugs or ignition coils start to fail, you might experience misfires, rough idling, or difficulty starting the car. These issues often trigger the check engine light. Regularly replacing spark plugs according to your vehicle’s maintenance schedule helps keep your ignition system functioning properly.

Problems with the Mass Airflow Sensor

The mass airflow (MAF) sensor measures how much air enters the engine so that the proper amount of fuel can be injected. When this sensor malfunctions, it can cause rough acceleration, stalling, and poor fuel-economy. Dirt buildup or a damaged sensor are common culprits. Cleaning or replacing the MAF sensor typically resolves the issue and helps restore smooth performance.

Check Engine Light Diagnostics & Repair in San Rafael, CA

For expert auto diagnostics and repair in San Rafael and the surrounding area, contact Auto Repair Specialist at (415) 612-3933. Feel free to give us a call to schedule an appointment for car care in greater San Rafael!