The pattern is maddening. The check engine light comes on. The dealer reads the code, replaces a sensor, clears the light, and hands back the keys. Two weeks later, the light is back.
A check engine light is not itself the defect. It is the car telling you a defect exists. When the light keeps returning for the same underlying problem, Florida's Lemon Law starts paying attention.
Why the light keeps coming back
A recurring check engine light usually means the dealer is treating symptoms instead of causes:
- An oxygen sensor or catalytic converter code that returns because the real issue is upstream
- Evaporative emissions leaks that pass the test in the shop and fail on the road
- Misfire codes that rotate between cylinders
- Sensor replacements when the actual fault is wiring or a control module
- Software updates that suppress the code for a while without fixing the hardware
Each round trip costs you time, and each one matters legally.
The legal building blocks
Florida's Lemon Law, Chapter 681 of the Florida Statutes, covers defects that substantially impair the use, value, or safety of a new or demonstrator vehicle. A recurring warning light can support impairment in practical ways:
- Some faults put the car in reduced power mode, impairing use
- A car that cannot pass inspection or hold a repair has impaired value
- Misfires and fuel system faults can raise safety concerns
The defect must first be reported within the Lemon Law Rights Period, the 24 months following delivery. From there, two thresholds create the legal presumption that the manufacturer had its chance:
- Three or more repair attempts for the same defect, or
- Fifteen or more cumulative days out of service for repair.
Same light, same defect? The code question
Manufacturers sometimes argue that different trouble codes mean different defects, hoping to keep each code below three attempts. Do not let the code list control the story. What matters is the underlying nonconformity.
If the car repeatedly fails in the same system, with related codes and related parts, that is one defect being attempted over and over. Here is how to keep the record on your side:
- Ask for the diagnostic printout at every visit, showing the stored codes.
- Keep your complaint wording consistent: "check engine light returned, same as prior visits."
- Ask the service writer to reference the previous repair orders on the new one.
- Photograph the light and the mileage each time it comes on, so the timeline is independent of the dealer's records.
- Keep a one-page log: date light appeared, date of visit, code, part replaced, date light returned.
That log, next to a stack of repair orders, makes the pattern impossible to miss. Our deep dive on the three repair attempts rule covers how the counting works in arbitration.