Nissan Sylphy's new cvt fault light is on.

The reason why the car fault light is on is that the exhaust emission is not up to standard and the engine system is not working well.

1, the exhaust emission is not up to standard: such as poor fuel, three-way catalyst failure, excessive carbon deposition in the intake pipe, blocked fuel injector, oxygen sensor failure, engine flameout occasionally, etc.

2. The engine system is not working normally: for example, the accelerator pedal sensor, throttle position sensor, air flow meter, crankshaft position sensor, etc. are faulty or have poor line contact.