Our Three-Step Diagnostic Testing Process
A stored code tells a technician which system triggered an alert. It doesn’t always tell them why. Our process goes further, using advanced, manufacturer-level equipment to confirm the actual cause before any repair is recommended.
Step 1: Vehicle Testing
Our technicians connect your vehicle to advanced, manufacturer-level equipment and conduct detailed testing of the relevant systems. This goes beyond pulling a code from the onboard computer. Sensor readings, component behavior, and related systems are all examined to build a complete picture.
Step 2: Digital Vehicle Inspection Report
After testing, you receive a Digital Vehicle Inspection (DVI) report outlining what our technicians found and what repairs they recommend. The report is yours to review at your own pace.
Step 3: Your Decision
We walk you through the findings, answer your questions in plain language, and let you decide how you’d like to proceed. No work begins until you’ve given your approval.
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.
Clear Answers, No Surprises
No repair or maintenance work is ever performed without your approval. That’s not a policy we advertise as a selling point. It’s simply how we operate at Christian Brothers Automotive Aurora.
What Triggers a Warning Light and What Happens Next
Your vehicle’s onboard computer system (ECU) monitors data from sensors covering engine performance, emissions, transmission behavior, and more. When a sensor reading falls outside the normal range, the system logs a diagnostic trouble code and may trigger a dashboard warning light. The code points to the system involved. Pinpointing the exact cause within that system is where testing comes in.
Drivers in Aurora, IL come in for car diagnostic testing for a range of reasons: a check engine light that appeared overnight, rough idling that’s gotten worse over a few weeks, a noticeable drop in fuel economy, stalling at low speeds, or sounds that didn’t exist before. Any of these can point to a sensor issue, an emissions problem, or something deeper in the engine or drivetrain.
We also offer a complimentary shuttle service, so you can get on with your day while your vehicle is being tested. Call (331) 343-5161 to schedule your appointment.
Code Reading vs. Diagnostic Testing
A basic code read tells you which system set off the alert. Diagnostic testing verifies what’s actually happening inside that system. Our technicians check sensor readings and related components tied to a stored code rather than simply replacing the most common part associated with it. That approach can help avoid unnecessary repairs and support a more accurate understanding of the cause.
How Long Does a Diagnostic Appointment Take?
Testing time varies depending on the complexity of the issue. A straightforward check might be resolved quickly. A drivability issue that only appears under certain conditions may require more involved testing or a test drive to reproduce the symptom. We’ll keep you informed throughout.
Why Early Testing Matters
A warning light or a subtle change in how your car drives is often the earliest signal of a developing problem. Catching it early can mean addressing a smaller issue rather than a larger repair down the road. If something doesn’t feel right, diagnostic testing is a clear way to understand what you’re dealing with.
Your Local Christian Brothers Amenities
FAQs
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Q. "What does a vehicle test do?"
Today’s vehicles are more advanced than ever. They’re essentially computers on wheels, with complex systems controlling everything from performance and safety to comfort and efficiency. When a warning light comes on or something feels off, our testing process takes a deep dive into these systems to identify the real issue, not just a surface-level code. This thorough approach goes far beyond a quick parts-store scan and helps ensure repairs are accurate, effective, and long-lasting.
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Q. "How long does a vehicle test take?"We believe in doing things right, not rushing through them. While some tests can be completed quickly, others take more time, depending on the concern. Our priority is accuracy, so you can feel confident in the results and the next steps. We’ll always keep you informed along the way, giving you peace of mind on the road to the people and places that matter most.
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Q. "When should I get a vehicle test?"
Vehicle testing is essential anytime a warning light comes on, your vehicle feels different, or during routine maintenance visits. Regular testing helps catch small issues before they become bigger problems, keeping your car safe, reliable, and running at its best.
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Q. "Do you offer a shuttle service?"Yes! we understand you have a full schedule. Whether you need to get to work, school, or need to attend to other responsibilities, we can take you where you need to go. Click here to learn more.
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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 a 3-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.
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