Fort Collins Auto Repair

Can Failing Spark Plugs Turn on My Check Engine Light?

Spark plugs have a super important job when it comes to your automobile. They are the parts that enable the spark to start up the combustion process, which is necessary to start your car. Spark plugs put your engine's pistons in motion, essential for a precise air-fuel mixture.


If you get into your vehicle and find that your engine won't start, you may instinctively assume that the problem is with the battery. However, it could very well be failing spark plugs. How do you know if your spark plugs are faulty, and do they cause your vehicle's check engine light to turn on? The answer is - YES! Old spark plugs can cause your vehicle's check engine light to come on. When these things grow old, they can cause your engine to misfire, which will trigger the check engine light to illuminate. The other symptoms of failing spark plugs include the following: 

  • Rough idling
  • Problems accelerating
  • Trouble starting your vehicle
  • Increased exhaust emissions
  • Poor fuel efficiency
  • Overall inadequate vehicle performance

Spark Plug Replacement in Fort Collins, CO

If you're experiencing any of these problematic issues listed above, we invite you to ASR Automotive for a complete inspection. Our certified technicians can determine if your vehicle needs new spark plugs or a different type of repair. Engine trouble can take a wrong turn very quickly and could lead to further damage.


Spark plugs are a part of preventative maintenance that ASR Automotive can easily take care of. If you want to be extra cautious, you can get them replaced before they fail. You can understand more about your vehicle's spark plugs by referring to the car's owner's manual. If you suspect that you need spark plug replacement, please give us a call or stop by our shop today! 

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