When you bring your vehicle to us, you’ll know what’s happening at every step. Our ASE-certified technicians use manufacturer-quality equipment to service your vehicle correctly the first time, and they take the time to walk you through what they find in plain language. No jargon, no guesswork, no surprises.
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 Sun Prairie Drivers Trust Us with Their Vehicle
Our Sun Prairie location has owner/operators on-site every day, which means there’s a real point of contact who takes personal responsibility for the work done on your vehicle. That accountability matters when your car is in someone else’s hands.
We back every repair with an industry-leading warranty, because we stand behind our workmanship. That confidence is part of why Christian Brothers Automotive Sun Prairie has been named #1 in Customer Satisfaction Among Aftermarket Full-Service Maintenance and Repair Providers in the J.D. Power 2025 Aftermarket Service Index Study, for the sixth consecutive time.
We operate by a simple principle: love your neighbor as yourself. In practice, that means treating every customer with the honesty and care we’d want for our own family’s vehicles.
What Your Check Engine Light Is Telling You
The check engine light connects to your vehicle’s onboard diagnostic system, which monitors dozens of components at once. Common triggers can include a loose or damaged gas cap, an aging oxygen sensor, an ignition misfire, an EVAP (evaporative emission control) system leak, or reduced catalytic converter efficiency. The range is wide, which is exactly why a proper diagnosis matters.
How the light behaves can tell you something about urgency. A steady light typically points to an issue that warrants prompt attention but isn’t an immediate emergency. A flashing light usually signals an active ignition misfire that can overheat and damage the catalytic converter if you keep driving. When it’s flashing, getting off the road and calling us is the right move. Either way, leaving a check engine light unresolved can turn a manageable issue into a costlier repair or an unexpected breakdown.
We work with all major extended warranty providers, so covered repairs don’t have to mean out-of-pocket surprises. We also offer a complimentary shuttle service, so getting your car diagnosed doesn’t have to derail your day. Call (608) 390-1067 and we can find a time that works for your schedule.
Why Reading a Code Isn’t the Same as Finding the Problem
When your vehicle triggers a check engine light, the OBD-II system stores a diagnostic trouble code. That code points to a general system or component, such as the oxygen sensor circuit or the EVAP system. It doesn’t identify the specific part that needs replacing or confirm that the component itself has failed. Confirming the exact cause typically requires reviewing live sensor data alongside the stored code, not just reading the code alone.
Replacing parts based on a code without that deeper investigation can mean unnecessary expense and a light that comes right back on. A real diagnostic goes further.
Any Make, Any Model, Flexible Scheduling
We service any make and model in Sun Prairie, including diesel engines, so whatever you’re driving, we can take a look. We offer flexible appointment times to fit into busy schedules. Reach out to Christian Brothers Automotive Sun Prairie at (608) 390-1067 and let’s get your vehicle diagnosed and back on the road.
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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"Great guest service once again. Nathon and Scott are awesome. They treat you with respect and honesty. Also like an old friend."
- Great service