5 Common Issues that Cause the Check Engine Light to Turn On

Apr 18, 2024

If your check engine light illuminates, you’ll want to get to the shop for diagnostics ASAP. While this light doesn’t necessarily mean that disaster is near, it’s still best to get the issue identified and addressed before it escalates. At Automotive Repair Specialist, we provide expert check engine light diagnostics and repair in the greater Nampa, ID area. Here are five common check engine light triggers.


Faulty Oxygen Sensor

Oxygen sensors monitor the amount of unburned oxygen in the exhaust gasses, helping your car's computer calculate the best air-to-fuel ratio. When an oxygen sensor fails, your engine can burn more fuel than necessary, leading to decreased fuel-efficiency and increased emissions.


Catalytic Converter Issues

The catalytic converter plays a crucial role in reducing harmful emissions by converting toxic gasses into less harmful ones. However, it can become clogged or damaged, leading to poor engine performance and an illuminated check engine light. 


Faulty Mass Airflow Sensor

The mass airflow (MAF) sensor measures the amount of air entering the engine, allowing the computer to adjust fuel delivery accordingly. A faulty MAF sensor can disrupt this balance, leading to rough idling, poor acceleration, and decreased fuel-efficiency. It's a common culprit behind an illuminated check engine light activation and should be addressed promptly.


Spark Plug or Ignition Coil Problems

Spark plugs and ignition coils play a vital role in igniting the air-fuel mixture in the combustion chamber. Worn-out spark plugs or faulty ignition coils can lead to misfires, rough engine performance, and an illuminated check engine light. Regular maintenance, including spark plug replacement, can help prevent these issues.


Loose or Damaged Gas Cap

In some cases, something as simple as a loose or damaged gas cap triggers the check engine light. The gas cap seals the fuel system and helps maintain proper pressure. Issues with it should be taken care of ASAP.


Check Engine Light Repair in Nampa, ID

For auto repair in Nampa and the surrounding area, contact Automotive Repair Specialist at 208-461-1330. At our nearby auto shop, we can expertly handle your vehicle’s repair and maintenance needs. Feel free to give us a call today to schedule an appointment!

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