By Lloyd's Automotive & Transmission Specialists
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November 7, 2024
The check engine light can be alarming, especially if you’re not sure what’s causing it. While this dashboard light indicates that your car’s onboard diagnostics system has detected an issue, it doesn’t tell you exactly what’s wrong. Many check engine light triggers are minor, but others could signal serious problems that require immediate attention. At Lloyd’s Automotive & Transmission Specialists, we provide expert check engine light diagnostics and repair in the greater Olympia area. Here are five of the most common reasons that check engine lights turn on. Faulty Oxygen Sensor Oxygen sensors monitor the amount of oxygen in the exhaust gasses and help regulate your car’s air-fuel mixture. If the oxygen sensor is malfunctioning, it can lead to poor engine performance and reduced fuel-economy, as well as increase your vehicle’s emissions. Replacing a faulty oxygen sensor is generally an easy fix that can improve your car’s efficiency. Malfunctioning Catalytic Converter Your car’s catalytic converter reduces harmful emissions by converting exhaust gasses into less toxic pollutants. If the catalytic converter isn’t working correctly, it can trigger the check engine light and lead to poor fuel-efficiency and sluggish performance. Loose/Missing/Damaged Gas Cap A loose or faulty gas cap is one of the simplest reasons for a check engine light to turn on. If the cap is loose or damaged, fuel may evaporate before your engine gets the chance to run on it. Faulty Mass Airflow Sensor The mass airflow sensor measures the amount of air entering the engine so the computer can inject the correct amount of fuel. When the MAF sensor is faulty, it can throw off your car’s air-fuel mixture, leading to rough idling, poor fuel economy, and even stalling. A faulty MAF sensor is a common reason for a check engine light, and it’s generally easy for the mechanic to diagnose and replace. Worn-Out Spark Plugs or Ignition Coils Spark plugs and ignition coils are essential for igniting the air-fuel mixture in your engine’s cylinders. If your spark plugs or ignition coils are worn out or damaged, they may cause misfires, which can trigger the check engine light. Replacing worn-out spark plugs and ignition coils is a straightforward fix, and doing so can help restore your car’s performance and prevent further issues. Check Engine Light Repair in Olympia, WA When you need auto repair in Olympia and the surrounding area, contact Lloyd’s Automotive & Transmission Specialists at (360) 357-7422. Feel free to give us a call to schedule an appointment!