Why is my check engine light on? A look at 4 frequent triggers

Few dashboard warning lights cause as much concern as the check engine light. While the problem may be something relatively minor, it can also indicate a more serious issue that requires immediate attention. Modern vehicles use sophisticated onboard diagnostic systems to monitor engine performance and emissions, illuminating the check engine light whenever they detect a fault. Ignoring this warning can lead to reduced fuel-efficiency, poor performance, and costlier repairs. At All Engines & Transmissions, we provide expert check engine light repair in the greater Westminster, CO area. Here are four of the most common reasons your check engine light may come on.
Faulty Oxygen Sensor
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 and emissions. Over time, oxygen sensors can become contaminated or fail due to age. A faulty sensor may reduce fuel-economy, increase emissions, and cause the engine to run less efficiently.
Failing Mass Airflow Sensor
The mass airflow (MAF) sensor measures the amount of air entering the engine so the correct amount of fuel can be delivered. When the sensor becomes dirty or fails, the engine may develop rough idling, hesitation, poor acceleration, or reduced fuel-economy.
Catalytic Converter Problems
The catalytic converter helps reduce harmful exhaust emissions by converting pollutants into less harmful gases. If the converter becomes clogged or damaged, the check engine light may illuminate, and you may notice reduced engine performance, sluggish acceleration, and decreasing gas mileage.
Worn Spark Plugs or Ignition Components
Spark plugs and ignition coils work together to ignite the air-fuel mixture inside the engine. As these components wear out, they can cause engine misfires, rough running, reduced power, and increased fuel consumption. Engine misfires often trigger the check engine light and should be repaired promptly, as prolonged misfires can lead to more expensive repairs.
Check Engine Light Repair in Westminster, CO
For engine repair and replacement in Westminster, CO and the surrounding area, contact All Engines & Transmissions at (720) 707-0183. Feel free to give us a call to schedule an appointment!












