What is the channel number for the Passat wheel speed sensor?

[VanAlice]

The sensor channel numbers range from 31 to 34. The sensor utilizes the Nernst principle: It employs a ceramic sensing element to measure the oxygen potential in the vehicle's exhaust pipe. Based on chemical equilibrium principles, it calculates the corresponding oxygen concentration, thereby monitoring and controlling the air-fuel ratio of combustion to ensure product quality and compliance with exhaust emission standards. The ECU determines whether the air-fuel ratio is too low or too high based on the electromotive force difference from the oxygen sensor and adjusts the fuel injection duration accordingly. However, if the oxygen sensor malfunctions and outputs abnormal electromotive force, the (ECU) computer cannot precisely control the air-fuel ratio. Relevant requirements for oxygen sensors: Since the purification capability of the three-way catalyst for CO, HC, and NOx drops sharply once the air-fuel ratio of the mixture deviates from the theoretical value, an oxygen sensor is installed in the exhaust pipe to detect the oxygen concentration in the exhaust and send feedback signals to the ECU. The ECU then adjusts the fuel injection quantity to maintain the air-fuel ratio of the mixture near the theoretical value.