Check Engine Light Diagnostic in Dunwoody, Georgia

A flashing or blinking check engine light should never be ignored. There are many things that can cause your check engine light to turn on. The best way to determine the issue is to have a check engine light diagnostic performed by a professional auto repair shop in Dunwoody, Georgia.

McCullough NAPA Car Care can troubleshoot the cause of your check engine light and perform any necessary services to fix the issue.

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Schedule Your Check Engine Light Diagnostic in Dunwoody, Georgia

A check engine light diagnostic scans your system for a specific fault code. This fault code will help our ASE-certified technicians determine what issue your engine is experiencing. From there, our technicians use the fault code to examine your engine problem further. Once the cause of your engine issue is found, we can make the necessary repairs and turn your check engine light off.

McCullough NAPA Auto Care staffs ASE Certified technicians with the experience and technology to properly diagnose any engine problems you may be having. Complete the form below to schedule your check engine light diagnostic in Dunwoody, Georgia, today!

I have an older vehicle so I see these folks more than my wallet likes. They are amazing, friendly, people that are a pleasure to work with. I can't recommend them enough.

Reid Ramsay
November 4, 2020

Had experienced front tire damage hitting metal debris on I-285 just before Rosewll exit. Immediately exited on Roswell and saw NAPA sign and pulled in. Place was busy! But got attention immediately by Jeff service worker. Got tire off my car no waiting. Wow! Determined rim bent but tire still good. He could have sold me a new tire and i would have not known better. So appreciative. Then met with Eric McCullough and quickly arranged to have rim fixed. I decided on new tires for safety and were worn. Eric got me great deal on tires and had my car fixed SAME day. Eric runs a super customer-focused operation. Kudos! Bruce Fike

Bruce Fike
August 1, 2020

I found my new home for car repair. Eric was very nice and honest. We definitely be coming back! Thank you for the excellent customer service.

Rosani Reynoso
October 21, 2021
My experience here was great! Fast, curious, and fairly priced. I didn't think a repair shop like this existed. I'll be a lifelong customer.

Walt Anthony
August 6, 2020

We had an issue with a splash shield dragging and overheating. We are heading back to Kansas this afternoon. They were able to fit us in despite being super busy & do a quick fix and sent us on our way in 10 minutes. So kind and amazing service!

Emma Perez
June 18, 2022

Quick and excellent service. I was turned away at my regular mechanic because he said he didn’t know how to do a transmission fluid change. This was my first time ever going to McCullough auto care, and I was very happy with my service. They were able to see me immediately and were patient with me considering the circumstances. Eric was great, and even matched the prices of another mechanic down the road. I will be back! Would recommend!

Caitlynn McFee
November 19, 2019
The technicians are excellent, very experienced, and the customer service is great. Everything was explained in detail so that I would understand.

Scott Nicholson
December 1, 2020

Honest and fair price!!! I went in for 60k mile service. They said I only needed oil and cabin air filter changed. That is refreshing honesty! Saved me big bucks! This will be my new shop for my car service. ☺

Scott O'Kon
August 22, 2020

Came in for emissions and they exceeded my expectations! Saw headlight out, replaced it. Saw no oil sticker, checked it and put a little in it until i can get back in for change. While waiting you could tell these guys really care about their customers and the safety of their vehicles. Definitely will be coming back here!

Nadia Perrmann
January 5, 2021
Great customer service! Eric and team did an awesome job coordinating their busy schedule with the schedule of my girlfriend and myself so that we would have a car during the work week and then trade off cars when the other was ready. They are extremely friendly and it felt like they had us as the customer in mind. Highly recommend!

Andrew r
June 10, 2021

Overall, McCullough car repair has done an outstanding work on my car. They are professional, honest, reasonable with cost and does the work on time. Most especially, Eric and Wes, they are top notch and I am highly satisfied with the outstanding work on my car. I highly recommend this car repair shop to my family, friends and all over Atlanta. I am extremely happy and highly satisfied with my car repair as well as the car repair cost. Thank you for the outstanding work and the job well done.

Jocelyn Dudley
July 22, 2021

This place is exactly the kind of service you come to expect. Great service, timely, and they never assume I don’t know what I’m talking about because I’m a girl.

Susan James
November 12, 2021
They diagnosed and repaired my car in time for my trip. Car works great! Eric provides excellent customer service even when he's got a ton on his plate.

Gavi Shapiro
May 10, 2022

Eric and his staff were great and helpful. The pricing was fair, and they let us know every step of the way what was wrong and what needed to be changed.

jcwolves .
June 28, 2020

Good, honest, and fair shop. If you are in sandy spring, I would not go anywhere else. Family owned and operated - take care of their customers and their crew it seems. 6 stars

Dog Guard - Atl
January 23, 2020
Awesome facility. Friendly staff.

Jeremy Ortiz
September 10, 2020

I have known Eric and the facility for over 30 years. The service from both a customer and repair stand point is excellent. You can expect to be treated with a high level of professional performance, and courtesy.

Mark Schacher
January 23, 2020

This has to be the best shop in town! When I got my car fixed the last time, It drove live new. I've never been so happy to get my car fixed in my life. They were very friendly and honest. This will be my go to place from now on. Not too far from my house which is a huge plus but even if it were, I'd be game to making the trip. Thanks for being honest and giving great service!

Davida Rose
October 9, 2019
Honest pricing..."as promised" timely repairs... and good customer service! - I keep coming back to McCullough with a different vehicle (Nissan Truck/Honda Truck/Honda Car) and they knock it outta the park every time!

Michael Smith
January 25, 2020

Eric and everyone at the shop is fantastic. I call and they are so kind and accommodating. No wonder they have so much business!!! Despite the amount of customers they have, they treat everyone with respect and attention. Love doing business here. Could recommend more. Fast, excellent service !! -Alexa

Sam Loy
May 16, 2022

Always great service. Always a fair price for very highly skilled technicians. After 20 years of depending on them, I've come to trust McCullough Auto Care blindly.

Clay White
November 25, 2019
Eric at McCullough has been taking care of my family's [multiple] cars for over 10 years now. A Volkswagen, a Nissan, and 2 Acuras: They've done minor repairs all the way to major transmission replacements. Eric is trustworthy, honest, and tells you what really needs to be done versus what can wait. Their prices seem reasonable (although in fairness I haven't been anywhere else recently b/c I'm so pleased with them), they are timely, and always communicate what the car needs in detail. I can't recommend these guys enough!

Juliana Buttram
September 19, 2019

This shop is the best. They did everything they could so I would have minimal time without my car such as having all parts ready before they scheduled the repair. They are super nice and no surprises on price. They opened up my bumper and found a part was damaged. They could have left it the way it and no one would have known but they were honest and did the right thing. I recommend 100%.

Graham Reifert
July 24, 2019

I’ve taken my cars here over the years and have been delighted w the team. They’re honest, professional, knowledgeable, and will shoot you straight. Prices are fair and they’ll tell you abt issues that may or will arise in the future and to keep that in mind for future reference. Overall an A

Alex Cameron
August 26, 2020
A staff of gentlemen ready to answer every question with a smile and great knowledge. They not only gave me a good estimate but they completed the work a day early! I highly recommend McCullough NAPA Auto Care to you. You will not be disappointed by the care they put into your vehicle.

Byung Ham
March 13, 2020

Great price and service! More polite and patient set of people! Along with efficiency! Such a great experience overall

Kiran Bandali
December 19, 2020

Fantastic service every time I go! The people here are friendly and knowledgeable and actually try to help you pay the lowest cost for your repairs! This is THE place to go for auto repairs 100%!

Thorin Thompson
April 26, 2022
What more is there to say? These guys are amazing. Their service is very thorough and quick. I was so worried about the cost of my repair but Eric and Brian put me at ease with their extremely reasonable prices! My truck is running like it's brand new again and I can't thank these guys enough!

Nicholas Kerr
March 1, 2020

This place has fantastic service times and an extremely knowledgeable staff. First time I went was for an emergency tire change and it went even more smoothly than I would have ever thought possible. Definitely recommend for any/all vehicle maintenance.

lee griner
November 18, 2019

Eric has been my service manager for years. He is always professional and easy to deal with. He goes out of his way to take care of your needs and makes accommodations to the customer when needed. They will ferry me and my car to and from their shop (I live within blocks) and I appreciate that very much. Everyone at McCullough is nice, friendly and helpful.

Jan Murray
May 2, 2021

Why Is My Check Engine Light Flashing?

Here are a few reasons why the check engine light may be flashing.

Worn Out Spark Plugs. Spark plugs create the spark that ignites the mixture of fuel and air to create combustion and power your engine. Dull or worn-out spark plugs can misfire, which could cause your check engine light to turn on.
Loose or Faulty Gas Cap. That’s right. something as simple as a loose gas cap can cause your check engine light to turn on. This can cause you to lose fuel from evaporation and is an easy fix to make.
Issues with Your Catalytic Convertor. The catalytic converter changes carbon monoxide into carbon dioxide. When your catalytic converter isn’t working properly, you’ll experience a loss in fuel economy and performance. There are many possible causes for a failing catalytic converter, all of which can cause the check engine light to turn on.
Failing Mass Airflow Sensor. The mass airflow sensor is responsible for determining how much air should enter your engine. Issues with your engine will occur when your MAF (Mass Air Flow sensor) is not calculating air intake properly. This can cause your check engine light to turn on.

If your check engine light is flashing or blinking, that means you have a serious problem. If it’s on but not flashing, there is still an issue, but not as severe. In either case, we urge you to bring your vehicle into our shop when the light turns on. Our ACE-Certified Technicians can perform a check engine light diagnostic and find the root cause of the issue and make repairs as needed.