Auto Check Engine Light: Troubleshooting Tips

Posted by Charles Taylor on February 25, 2024

Today’s vehicles are designed to operate without too much hands-on interference from the driver. As automotive technology continues to advance, our cars will need us even less. Standard on-board computer systems automatically track performance and notify us when issues arise. That is when we need to take steps to correct the problem. When the check engine light illuminates the dash, it signals a situation that requires immediate correction. The check engine light may be triggered by a loose gas cap or a more involved issue like a faulty car battery or clogged filter.

Check Engine Light: DIY Tips

While some check engine light issues require professional attention, there are a few DIY troubleshooting tips you can try yourself before seeking help. These DIY solutions can save you time and money.

Faulty Car Battery

A weak or faulty car battery can sometimes trigger the engine light. First, make sure the battery terminals are free of corrosion. If they need to be cleaned, use a little baking soda, water, and a non-metal stiff bristle brush. Then, inspect the charge indicator window – look for a green dot to show if it’s still good. A yellow or red dot means it is time to replace your battery.

Inspect the Wiring

Examine the wiring connections around the engine compartment for any signs of damage or corrosion. Loose or damaged wires can cause electrical issues and trigger the engine light. Repair or replace damaged wiring as needed.

Replace Dirty or Clogged Filters

Dirty air filters or clogged fuel filters can impact engine performance and activate the engine light. Read your owner’s manual to locate your vehicle’s cabin, engine, and fuel filters. Then, remove and inspect the filters. Replace any dirty and clogged filters with only manufacturer-recommended parts.

Check Fuel and Oil Levels

Low fuel or oil levels can sometimes trigger the engine light. Check your fuel and oil levels regularly and add more when needed. Be sure to use the appropriate grade fuel and oil type for your vehicle.

Tighten or Replace Gas Cap

A loose or damaged gas cap can often cause the Check Engine Light to come on. If the gas cap isn’t sealed completely, it can cause an EVAP (Evaporative Emission Control System) leak. Remove your gas cap while your car is NOT running, and look carefully at the inner seal and outer cap. You should purchase a replacement gas cap if you notice any signs of damage like cracks, pits, or tears.

Reset the Check Engine Light

The check engine light may occasionally come on due to a temporary glitch or minor issue. There are several ways to override or reset the check engine sensor. It may require you to disconnect the battery for a while or turn your engine on & off several times in a row. Read your owner’s manual to find out how to reset the check engine light sensor for your specific vehicle.

Check Engine Light: Seek a Certified Technician

Lack of Experience or Knowledge: If you are unsure about the problem or lack experience with automotive repairs, it’s best to leave it to the professionals. Attempting complex repairs without the necessary knowledge can lead to further damage or safety hazards.

Persistent Check Engine Light: If your check engine light continues to come on after attempting DIY solutions, it’s time to consult a certified technician. They have the expertise and tools to diagnose and repair the issue accurately.

Specialized Tools or Equipment: Some check engine light issues require specialized tools or equipment to diagnose and repair properly. Professional auto technicians have these tools and can provide accurate and efficient repairs.

Warranty or Recall Concerns: If your vehicle is still under warranty or there is a recall related to a check engine light issue, get the problem addressed by an authorized service center.

Complex Repairs: Certain check engine light issues, such as problems with the transmission or the engine control module, require advanced automotive expertise. It is best to leave complex repairs to trained technicians.

Check Engine Light Service in Kirkland, WA

Trusted for over 35 Years, Fisher’s Auto Service specializes in auto repairs, routine maintenance, and diagnostic services. Whether your car has a faulty car battery, clogged filter, or a more serious issue, our experienced auto care advisors and technicians will troubleshoot your check engine light and get you back on the road.