Our Check Engine Light Diagnostic Process
Accurate testing starts with what you’ve noticed. We’ll ask when the warning appeared, whether it’s steady or flashing, and whether the vehicle’s starting, acceleration, fuel economy, engine temperature, or drivability has changed.
Diagnostic service may include:
- Code retrieval: We review information stored by the OBD-II system, the onboard computer that monitors engine and emissions operation.
- System testing: Our technicians inspect and test the relevant systems rather than treating the code as a final diagnosis.
- Cause confirmation: We identify the condition responsible for the warning and document relevant findings.
- Recommendation review: A service advisor explains the results and proposed work before repairs begin.
When appropriate, we can complete approved work immediately. We may also schedule the repair based on parts and customer availability.
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.
See What Our Inspection Found
Our Digital Vehicle Inspection can include photos and videos documenting vehicle findings and recommendations. You can review the information digitally or discuss it with our service team.
We can connect the dashboard warning to the confirmed condition and recommended next step. If postponing a repair could affect your vehicle, we can explain why so you can review the automotive repair estimate with useful context.
Symptoms That Can Make Service More Urgent
A steady malfunction indicator lamp, often called the engine warning light, may appear without an immediate change in how the vehicle drives. It still needs evaluation, but the urgency depends on the light’s behavior and any accompanying symptoms.
Tell us if you’ve noticed:
- Rough idling or severe shaking
- Reduced acceleration or loss of power
- Hard starting or unusual engine sounds
- Lower fuel economy or changes in exhaust behavior
- Unusual smells, smoke, or overheating
A flashing light or one accompanied by severe shaking, smoke, overheating, or substantial power loss requires urgent attention. If the vehicle appears unsafe to operate, pull over safely and arrange assistance instead of continuing to drive.
Why a Scanner Code Isn’t a Complete Diagnosis
A personal code reader can identify a diagnostic trouble code, but several conditions may produce similar results. The underlying cause could involve wiring, a sensor, the ignition or fuel system, a vacuum leak, or a mechanical problem. Each possibility requires different testing.
Replacing a part based only on a code can leave the real problem unresolved. Some causes are minor, while others can affect emissions, fuel economy, drivability, or engine operation. Professional testing replaces guesswork with evidence and can identify a condition before it worsens.
What to Share Before Diagnostic Testing
You don’t need to diagnose the problem yourself. A few observations can give our technicians a useful starting point.
Before your visit, note:
- Whether the warning is steady, flashing, or intermittent
- When the light first appeared and whether it turned off and returned
- Whether it followed fueling, maintenance, or another vehicle change
- Any changes in starting, acceleration, noises, smells, fuel economy, or engine temperature
- Any code retrieved with a personal scanner
Get a Clear Next Step for Your Vehicle
Drivers in Windsor and the surrounding Fort Collins and Larimer County area can arrange engine warning light service at our Windsor location. We combine manufacturer-quality equipment with transparent explanations, giving you the information needed to make an informed repair decision. If you approve a repair, our warranty-backed workmanship provides added peace of mind. Complimentary shuttle service is also available for many visits.
Contact Christian Brothers Automotive Windsor to arrange your diagnostic visit. Schedule Appointment or call (970) 548-8536.
Your Local Christian Brothers Amenities
FAQs
-
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.
-
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.
-
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.
-
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.
-
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.
-
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
-
"I liked the customer service and going above and beyond to make sure I was comfortable while waiting in the store for my vehicle work to be done, specifically being offered a nice hot coffee with creamer."
- J.L.