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Check Engine Light Diagnostic Services

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Same day appointments can sometimes be accommodated.

The first sign that there may be an issue with our car or truck is when the check engine light comes on for many of us. Yet, most of us aren’t aware of what issue or issues a check engine light is notifying us of. Our check engine light diagnostic services at Lockett’s Auto Care are part of our regular maintenance service. We can retrieve the diagnostic trouble codes from your vehicle, identify the issue, and explain what your vehicle needs. Numerous diagnostic codes come out of diagnosing what the check engine light is signaling.

Our Check Engine Light Diagnostic Services

The check engine light or CEL will light up for several reasons. But some issues trigger a diagnostic trouble code (DTC), which means that immediate attention is necessary. Usually, these are emissions-related and not necessarily urgent. However, it’s never a good idea to ignore or delay bringing in your vehicle for servicing. Some faults can result in the check engine light coming on and going off either seasonally, by the day, with mileage, or because of electrical issues.

Understanding the Maintenance Service Codes

More automobile manufacturers are starting to incorporate maintenance codes into their driver information centers. Yet, this maintenance required light is not the same as the CEL. The codes indicate what scheduled maintenance services and inspections are required and mileage for the vehicle at the given time. On modern-era cars, the logic/algorithm behind the maintenance schedule and indicator light goes beyond past systems’ simple time and mileage tracking. Now things such as key cycles, engine warm-ups, on/off time, and other driving characteristics are used to determine the necessary maintenance services. 

Check Engine Light FAQs

Your vehicle’s CEL will turn on for a variety of reasons from minor issues like your gas cap being loose to major malfunctions with the engine, transmission, or emissions.

When a vehicle’s CEL comes on, it’s necessary to schedule an appointment with automotive experts as soon as possible so they can diagnose the issue and resolve it. The longer a CEL is on the more damage is being done to your vehicle.
Once the issue or issues that triggered the CEL coming on is resolved, the light will turn off or reset.


When your check engine light comes on, don’t ignore it. One of the quickest and easiest ways to maintain your car or truck’s health is by getting the right diagnostic service necessary. Our technicians have the skills necessary to isolate your vehicle’s issue and provide the service necessary to get you running at peak performance again. Some of our other services include:
  • Engine services
  • Brake repair
  • Tires and wheels
  • Alignment
  • Suspension and steering
Whatever your issue, our team will provide an honest, thorough assessment with the fairest pricing around. Reach out to us today at 410.744.4328.