Failed an emissions test in Georgia? We diagnose and repair emissions failures on BMW, Mercedes-Benz, Audi, Volkswagen, and Porsche — from O2 sensors and catalytic converters to EVAP systems and EGR valves.
An emissions failure is not just a sticker problem — it points to a real issue that needs to be properly diagnosed and repaired.
German car emissions systems are complex — brand-specific sensor specs, proprietary EVAP designs, and tight air-fuel control systems that require the right diagnostic tools to properly evaluate. A generic emissions shop often replaces parts at random until something works.
Call us and bring in your emissions failure report. The report lists exactly which tests failed and what codes were present. We use that as a starting point for our diagnosis, confirm the root cause with brand-specific diagnostic software, and give you a written repair estimate. Don't just replace the part listed on the failure report — sometimes it's a symptom, not the root cause.
Georgia's OBD emissions test checks for two things: active fault codes AND OBD readiness monitor completion. If you recently cleared codes or disconnected the battery, the readiness monitors may not have completed their drive cycles — causing a "not ready" failure even with no active faults. We check monitor status and advise on the correct drive cycle to complete them before you go for re-testing.
After emissions repairs, most vehicles need 50–100 miles of mixed driving to complete all OBD readiness monitors. Some monitors — particularly the catalyst and EVAP monitors — require specific drive conditions to complete. We advise on the correct procedure for your specific vehicle so you pass on the first re-test rather than making multiple trips.
Georgia offers a cost waiver that allows a vehicle to pass emissions even with a remaining fault if you've spent over a certain threshold on repairs at a certified emissions repair facility. The requirements and amounts change periodically — call us and we'll advise on whether your situation qualifies and provide the required repair documentation.
Yes. We diagnose and repair emissions failures on BMW, Mercedes-Benz, Audi, Volkswagen, and Porsche using brand-specific diagnostic software for each. Generic scan tools miss a lot of what these vehicles can tell us about the emissions system — we use the right tools for every brand.
Not always. A P0420 or P0430 code (catalyst efficiency below threshold) can be caused by a failing catalytic converter, but it can also be triggered by a faulty upstream or downstream O2 sensor, an exhaust leak before the cat, or engine oil consumption contaminating the cat. We verify catalyst efficiency with live O2 sensor data before recommending a replacement — saving you from an unnecessary $1,000+ repair.
Serving Snellville, Loganville, Grayson, Lawrenceville, and all of Gwinnett County.