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.
A Warranty That Goes Where You Go
Every repair we complete at Christian Brothers Automotive Valley Ranch is covered by the Nice Difference® Warranty: 3 years or 36,000 miles, whichever occurs last. That coverage follows you to any Christian Brothers Automotive location in the country, not just the Irving shop where the work was done.
Christian Brothers Automotive is also ranked #1 in Customer Satisfaction Among Aftermarket Full-Service Maintenance and Repair Providers per the J.D. Power 2025 Aftermarket Service Index (ASI) Study, six consecutive times. When you bring your check engine light concern to us, you’re choosing a shop with a documented record of thorough diagnostic and repair work.
What Your Check Engine Light Is Actually Telling You
The malfunction indicator lamp (MIL), commonly called the check engine light, activates when your vehicle’s onboard computer logs a fault code through its OBD-II diagnostic system. That code identifies which system flagged an issue, but it doesn’t name the failed component. That distinction matters: replacing the wrong part wastes money and leaves the real problem in place.
The behavior of the light gives you an initial signal about urgency. A flashing check engine light means an active, serious fault is occurring, often a cylinder misfire that can damage a catalytic converter within a short drive. Reduce speed, limit driving, and get to a shop quickly. A solid check engine light points to a stored fault. The vehicle may feel normal, but the underlying condition can worsen fuel efficiency, emissions compliance, and the health of connected components over time.
Common Causes Worth Knowing
Some of the most frequent triggers our skilled technicians diagnose include:
- A loose or faulty gas cap causing an evaporative emissions system leak
- A failing oxygen sensor affecting fuel trim and emissions readings
- A malfunctioning catalytic converter reducing emissions performance
- A faulty mass airflow sensor disrupting the air-fuel mixture
- Worn spark plugs or failing ignition coils causing misfires
- Transmission or broader emissions system faults
Reading an OBD-II code narrows the search. Confirming the repair requires live-data testing and component inspection, which is exactly what our check engine light diagnostics are designed to deliver.
How Irving Driving Conditions Affect Your Check Engine Light
North Texas heat accelerates the degradation of oxygen sensors, catalytic converters, and fuel system components. Vehicles here can encounter check engine faults more frequently than those in milder climates because extreme temperatures place sustained stress on emissions-related parts. Add the stop-and-go traffic common along Irving’s busier corridors, and you have conditions that repeatedly cycle engine load, speeding wear on the same components most likely to trigger a fault code.
There’s also a practical deadline to keep in mind. Irving is in Dallas County, which requires an annual emissions inspection, and an active check engine light means an automatic test failure. Getting a diagnosis isn’t just about your car’s health. It’s a requirement for keeping your registration current.
Check Engine Light Service with an Extended Warranty
If your vehicle is covered by an extended warranty, bring that information when you schedule. We work with all major extended warranty providers and can help confirm coverage before any repair work begins. A list of the extended warranty companies we work with is available on our extended warranty service page.
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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"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.