What is the reason for the trouble light of Toyota Corolla engine?

Poor engine operation will lead to various fault lights, such as poor line contact of accelerator pedal sensor, throttle position sensor, air flow meter and crankshaft position sensor. It needs to be maintained and replaced according to relevant maintenance methods. If Toyota Corolla's exhaust emission is not up to standard, such as poor fuel, three-way catalyst failure, excessive carbon deposition in the intake pipe, fuel nozzle blockage, oxygen sensor failure, engine flameout occasionally, etc. , the engine fault light will light up. Among them, the poor quality of engine oil is the cause of the most engine failure lights, and the three-way catalyst needs to be replaced. Poor operation of the engine system can also lead to the lighting of fault lights, such as poor contact of lines such as accelerator pedal sensor, accelerator position sensor, air flow meter and crankshaft position sensor. When necessary, maintenance and replacement are essential. In addition, some vehicle gearbox system failures may also be indicated by engine failure lights, such as internal gearbox failures, slippage, excessive temperature, etc. Inspection and maintenance, need to go to the repair shop.