How Our Check Engine Light Diagnostic Process Works
From the moment you pull in, our process is designed to give you accurate answers fast. Here’s what to expect:
Step 1: Connect & Scan
We connect professional scan tools to your vehicle’s OBD-II system to retrieve stored diagnostic trouble codes and live sensor data. This is the starting point, not the finish line.
Step 2: Diagnose the Root Cause
Our technicians go further by testing individual components and systems to confirm what actually failed. A code tells us which system flagged an issue; our Full Service Diagnostic Testing tells us why. We use manufacturer-quality equipment throughout this step to support a thorough evaluation.
Step 3: Review Your Repair Plan
Before anything is repaired, we walk you through what we found in clear, plain language. No jargon, no pressure. You’ll know exactly what your vehicle needs and what it will take to resolve it.
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.
Why Aurora Drivers Trust Christian Brothers Automotive Arapahoe Road
Accurate diagnosis is only part of the picture. Here’s what sets our Check Engine Light Services apart:
- ASE-Certified Technicians: Every diagnostic and repair is performed by certified professionals trained to work on all makes and models.
- Manufacturer-Quality Equipment: We use the same caliber of tools and parts your vehicle was built for.
- Industry-Leading Warranty: Our workmanship is backed by a warranty that reflects our confidence in what we do.
- Complimentary Shuttle Service: Drop your vehicle off and get on with your day. We can get you where you need to go.
- Owner-Operators On-Site: There’s an owner on-site, which means direct accountability and a personal point of contact for your visit.
- Plain-Language Communication: We explain your vehicle’s condition in terms that make sense, so you can make an informed decision without needing an automotive degree.
Understanding Your Check Engine Light
Every vehicle sold in the United States since 1996 is equipped with an OBD-II system that continuously monitors engine performance, emissions, and other vehicle functions. When it detects a fault, it stores a diagnostic trouble code and turns on the check engine light. That code identifies the system involved, but it doesn’t pinpoint the specific component that failed.
That distinction matters. A basic code reader gives you a starting point. Professional diagnosis tests the actual components to confirm the cause, which is why two vehicles with the same code can require different repairs. Driving with the light on can reduce fuel efficiency, affect engine performance, and allow a minor fault to develop into a more significant repair.
Steady Light vs. Flashing Light
A steady check engine light means a fault has been detected and should be diagnosed soon. It doesn’t typically signal an immediate emergency, but waiting can allow the underlying issue to worsen. A flashing light is more urgent. It usually indicates an active engine misfire or another serious condition that can damage the catalytic converter. If your light is flashing, bring your vehicle in as soon as possible.
Common Check Engine Light Triggers
Several fault categories come up frequently during Full Service Diagnostic Testing. Knowing what to expect can help put the situation in context:
- Loose or Damaged Fuel Cap: One of the most common triggers, often appearing after a fill-up. Easy to resolve, but still worth confirming.
- Failing Oxygen Sensor: Monitors exhaust oxygen levels. A faulty sensor affects fuel economy and emissions output.
- Catalytic Converter Issues: Can result from carbon build-up or an unresolved engine problem upstream. Affects emissions and performance.
- Spark Plug or Ignition Coil Faults: Can cause engine misfires, rough running, and elevated emissions.
- Mass Airflow Sensor Malfunction: Measures the air entering the engine so the ECU can deliver the correct air-fuel mixture. When it fails, drivers often notice rough idle, sluggish acceleration, or hard starting.
- Evaporative Emission System Faults: Related to fuel vapor containment. Often triggered by fuel cap problems or a failing purge valve.
- Vacuum Leaks: Unmetered air entering the engine can set multiple fault codes and degrade overall performance.
Schedule Your Check Engine Light Service in Aurora
Don’t let a warning light turn into a larger repair. Christian Brothers Automotive Arapahoe Road on Arapahoe Road serves Aurora drivers who want real answers and reliable repairs, backed by our industry-leading warranty and complimentary shuttle service. Call (303) 957-1611 or schedule online to set up your appointment.
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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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"The CBA on arapahoe road is incredible. They were patient and kind with me and didn’t try to take Advantage of me what so ever. The guys at the front desk are extremely courteous and I am very happy with the work they have done to my car. I cant imag"
- Samantha