What happened to the fault light of Toyota VIOS engine?

The fault light of Toyota VIOS engine may light up for the following reasons:

1. Exhaust emission is not up to standard. Such as poor fuel, three-way catalyst failure, excessive carbon deposition in the intake pipe, fuel injector blockage, etc. Among them, the poor oil quality affects the engine fault light. Replace the three-way catalyst, refuel at a regular gas station or clean up the carbon deposit in the intake pipe and the blockage of the injector.

2. The engine system is not working properly. Affected fault lights, such as accelerator pedal sensor, accelerator position sensor, air flowmeter, crankshaft position sensor or poor line contact, will basically affect the engine fault lights, so you can go to 4s shop for repair or replacement.

3. Electronic control system sensor gap fault. Go to the repair shop to adjust.

4. The spark plug has poor ignition. Or repair or replace the spark plug.

5. The oxygen sensor is faulty. Or repair or replace. Million car purchase subsidy