For check engine light diagnosis near Windsor, CT, our South Windsor shop is across the Bissell Bridge on I-291 to Route 5. Bring your vehicle in for rough running, lower fuel mileage, or a failed emissions readiness check. Windsor drivers split time between I-91 highway speed and stop-and-go business traffic along Day Hill Road, which wears brakes and tires unevenly. A flashing check engine light usually means an active misfire that can overheat and damage the catalytic converter. Connecticut emissions testing requires the monitors to be ready, so clearing codes without a repair usually leads to a failed test. Service can include a full computer scan, code research, live data review, circuit testing, smoke testing for evaporative leaks when needed, and repair verification. Many repairs are finished the same day, and most eligible repairs include our 3-year/36,000-mile warranty.