How Our Check Engine Light Diagnostic Process Works
We follow a straightforward three-step process: read the stored diagnostic trouble codes, inspect the affected systems to verify the underlying cause, and walk you through what we found before any repair work begins. No surprises, no pressure.
1. Schedule Your Appointment
Whether scheduling online or over the phone be sure and let us know what you're experiencing so we can provide fast and accurate service advice.
2. Diagnostics and Inspections
Drop off your vehicle and the shop will get to work with inspections and diagnostics using the same equipment as the manufacturers to determine issues and next steps.
3. Digital Vehicle Inspection Report and Estimate
Following the diagnosis we will text you a digital vehicle inspection report, containing pictures and videos of our findings and recommendations.
4. Review and Approval
A service advisor will reach out to walk you through the findings and recommendations to determine how you would like to proceed, or you can approve work directly in your DVI.
5. Work Performed or Scheduled
Most work can be completed immediately, or scheduled based on parts and customer availability.
Convenience & Clarity at Our Aurora Location
Leaving your car for diagnostics doesn’t have to disrupt your day. Our complimentary shuttle service means you can drop off your vehicle and get where you need to go while we work.
When the diagnostic is complete, we explain what we found in plain language. No jargon, no guesswork on your part. Our free Digital Vehicle Inspection gives you actual photos from your vehicle during servicing, so you can see exactly what our technicians see. You’re in the loop at every step.
What to Expect From Check Engine Light Service in Aurora
Every visit to Christian Brothers Automotive Aurora begins with a Courtesy Inspection that gives us a baseline overview of your vehicle’s major systems. From there, the check engine light diagnostic starts with reading the stored codes, then moves into a visual and mechanical inspection of the systems those codes point to.
That second step is what separates a professional diagnosis from a code reader you can buy at an auto parts store. An OBD-II code identifies the circuit or system that reported a fault. It doesn’t tell you which specific component failed or why. We verify the root cause before recommending any repair, which helps you avoid replacing parts that don’t need replacing.
Once repairs are completed, we reset the check engine light and confirm the fault condition has been resolved. We only recommend services your vehicle actually needs, and you authorize every step before work begins.
Common Reasons a Check Engine Light Comes On
The check engine light can be triggered by a wide range of conditions. Some are minor. Others indicate serious system faults that can worsen if left unaddressed.
Frequent triggers include:
- Loose or faulty fuel cap
- Failing oxygen sensor
- Failing catalytic converter
- Failing mass airflow sensor
- Worn spark plugs or failing ignition coils
- Weak battery
- EGR valve problems
- Vacuum leaks
Because the OBD-II system reports the circuit that flagged the fault rather than the exact failed part, a code reader alone can’t tell you what actually needs to be fixed. A professional diagnosis is a reliable way to avoid unnecessary repairs.
Ignoring the light carries real costs: reduced fuel efficiency, higher emissions, accelerated engine wear, and repairs that can grow more expensive the longer the underlying issue goes unaddressed. Scheduling check engine light diagnostics early is often the lower-cost path.
Your Local Christian Brothers Amenities
FAQs
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Q. "What is the difference between a steadily lit and a flashing check engine light?"A steadily lit light means that a sensor is sending a signal to your vehicle's computer that something is wrong or it could simply mean that the sensor is out. If your check engine light is flashing, however, that means there is a serious issue and you should stop driving immediately.
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Q. "Why is my check engine light on but nothing seems to be wrong with my vehicle?"If nothing within your vehicle stands out, then it is possible that it is just a minor issue such as a loose gas cap or a bad O2 sensor. It is still recommended to see a mechanic if the light doesn't disappear to check for any larger issues.
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Q. "Do you offer a warranty?"As part of our Nice difference.® commitment to providing our customers the best auto service experience possible, we also offer a3-year/36,000-mile warranty on all the work that we do. We offer this warranty at every Christian Brothers Automotive nationwide, and it will be honored at any location, regardless of which branch did the initial work.
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Q. "Can you provide service under my extended warranty?"Yes. At Christian Brothers Automotive, we work with all major extended warranty providers to make needed repairs for our customers. If you have an extended warranty, you can discuss your carrier with our team when scheduling an appointment and confirm that the work will be covered. You can find a partial list of the extended warranty companies we work with here.
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Q. "What to do if your check engine light turns on?"We recommend heading to your local auto shop as soon as you are able. This is typically a sign that there is an abnormality within your engine.
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Q. "Is it safe to drive your car when the check engine light is on?"It depends. If you are experiencing other noticeable issues with your vehicle, it may be best to pull over. Otherwise, it is typically okay to drive to your local auto shop. You will want to get this checked sooner rather than later to avoid being stranded with a broken-down car.
Have more Questions?
Our friendly auto service experts have the answers.
Call your local Christian Brothers Automotive car shop today
Hear What Our Customers Had to Say About Us
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"As always perfect customer service and a job. Well done in a timely manner. Thank you so much to the team."
- Ingrid