Check Engine Light Diagnostics in Lilburn, GA
A code tells you where the car is unhappy. It does not tell you which part to buy. That part takes diagnosis.
The free code read at a parts store gives you a number. That number points at a system, not a component — an oxygen sensor code can be a bad sensor, or a vacuum leak, or an exhaust leak upstream of it.
We do the diagnostic work to find which it actually is, so you replace the part that is broken rather than the part the code was named after.
Bring it in if
The check engine light is on, steady or flashing
The car failed emissions testing
It is idling rough, stalling or hesitating
Fuel economy has dropped noticeably
A warning light you do not recognize has appeared
Something electrical has stopped working
Why bring it to us
Honest Recommendations
We explain what your vehicle needs and why, and what can wait.
Experienced Technicians
Modern diagnostics backed by decades of automotive experience.
Foreign & Domestic
We service both, and have since 2016.
Bilingual Service
Se Habla Español.
Drop Off Any Time
A 24/7 key drop box on site, so you are not tied to our hours.
Best of Gwinnett & CARFAX Top-Rated
Gwinnett Magazine 2023, 2024 and 2025, and a CARFAX Top-Rated Service Center 2024 and 2025.
Questions we get asked
Yes, and it matters. A flashing check engine light usually means a misfire that can damage the catalytic converter. Stop driving it and call us at 770-559-9302.
Reading the code takes seconds. Figuring out which of several possible causes it is takes time and equipment — that is what you are paying for, and it is what keeps you from buying the wrong part.
Yes. We handle failed-emission repairs and emission-related diagnostics.
Not if the actual cause is fixed. If it does, bring it back to us.
Schedule service
Tell us what is going on and we will call you back. Need help right now? Call 770-559-9302.
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Need help right now? Call or text us at 770-559-9302.
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Car trouble?
Let’s find the solution.
4674 Stone Mountain Hwy, Lilburn, GA 30047Monday–Friday: 8AM–5PM · Saturday & Sunday: Closed
24/7 key drop box on site