Where is the oxygen sensor located on an old Jetta?
1 Answers
The oxygen sensor on an old Jetta is located on the engine's exhaust pipe. Using the three-way catalytic converter as a reference point, the sensor before the converter is the front oxygen sensor, while the one after it is the rear oxygen sensor. The purpose of the sensor is to detect the oxygen concentration in the engine's exhaust gases. The sensor primarily measures the oxygen concentration in the exhaust gases after they have been purified by the three-way catalytic converter. Relevant information about the oxygen sensor is as follows: 1. Introduction: The oxygen sensor detects the oxygen concentration in the exhaust and sends feedback signals to the ECU. The ECU then adjusts the fuel injection volume to maintain the air-fuel ratio of the mixture near the theoretical value. 2. Function: The sensor measures whether there is excess oxygen in the engine's exhaust after combustion, i.e., the oxygen content, and converts this information into a voltage signal sent to the engine computer. This enables the engine to achieve closed-loop control based on the excess air factor, ensuring that the three-way catalytic converter maximizes the conversion efficiency of three pollutants in the exhaust: hydrocarbons (HC), carbon monoxide (CO), and nitrogen oxides (NOX), thereby optimizing the conversion and purification of emission pollutants.
