In 2006, Toyota Reiz cleaned the throttle. What if the headlights are on and the throttle doesn't respond?

Because there is no special fault diagnosis instrument, it is impossible to accurately determine the root cause of the fault. The following are some of the most likely causes of failure for your reference.

Oxygen sensor fault

In order to make the combustible mixture of the engine burn fully, improve the power of the engine and reduce the harmful substances in the exhaust gas, ECU can detect the oxygen concentration in the exhaust gas through the oxygen sensor, and control the fuel injection quantity accordingly, so as to keep the air-fuel ratio of the combustible mixture in the best state all the time. If the oxygen sensor fails, the ECU can't receive the oxygen concentration information, and the engine fault light will light up, which will be accompanied by the phenomenon of weak acceleration (weak fuel filler door) and increased fuel consumption.

Throttle position sensor fault

The throttle position sensor, also known as the throttle opening constant sensor, is mainly used to detect the specific working conditions of the engine and transmit it to the ECU according to the detection information, and then the ECU corrects the fuel injection amount according to the specific working conditions or controls the fuel cut. If the throttle position sensor fails, the ECU will not be able to accurately perceive the working state of the engine and correct the fuel injection according to the situation, resulting in unstable idle speed and weak acceleration of the engine.