Why does traction light up? in nissan sunny 2019

If you can, find a reader to decode stored errors. Codes may point to the abs/tc system with the exposed wheel sensors, wiring and toothed wheels for sensors more likely to fail. When traction control is active, it may brake the wheel that's spinning faster than the other three unless parts failed and falsely interpreted as one wheel spinning. Traction control can take over engine control and braking in real world situations to react faster than humans can when driving and exceeding speeds unsafe for conditions.