What are some of the most common causes of an illuminated check engine light?

Autobahn Specialists • 21 November 2023

If your check engine light flashes on, it doesn’t automatically mean that your engine is on the cusp of total failure. However, you should quickly get to the shop for computerized diagnostics so that the problem can be pinpointed and resolved before it gets worse. At Autobahn Specialists, we provide expert European check engine light diagnostics and repair in the greater Tacoma area. Here’s a look at five common check engine light triggers.


Faulty Oxygen Sensor

The oxygen sensor plays a crucial role in monitoring the level of oxygen in your vehicle's exhaust gasses. A malfunctioning sensor can lead to decreased fuel efficiency and increased emissions. Ignoring this issue can also lead to issues with the catalytic converter.


Failing Mass Airflow Sensor

Responsible for measuring the amount of air entering the engine, the mass airflow sensor contributes to maintaining the right air-to-fuel ratio. A malfunctioning sensor can lead to poor performance, decreased fuel efficiency, and, in some cases, engine stalling.


Catalytic Converter Issues

A malfunctioning catalytic converter can also trigger the check engine light. This crucial component helps reduce emissions by converting harmful gasses into less harmful substances. Ignoring catalytic converter issues can result in decreased performance and increased emissions.


Loose or Faulty Gas Cap

It might sound surprising, but one of the common reasons for the check engine light to illuminate is a loose or faulty gas cap. A loose cap can lead to fuel evaporating before it is directed toward your engine. Always ensure your gas cap is securely tightened after refueling.


Spark Plug and Ignition Coil Problems

Worn-out spark plugs or faulty ignition coils can lead to misfires and reduced fuel-efficiency, as well as an illuminated check engine light. Regular maintenance, including timely replacement of spark plugs and coils, can prevent this issue.


European Auto Repair in Tacoma, WA

When you need European auto repair in Tacoma and the surrounding area, contact Autobahn Specialists at (253) 474-0177. At our nearby European auto shop, we can expertly handle your Euro car’s repair and maintenance needs. Feel free to give us a call today to schedule an appointment!

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