What is the voltage range of the rear oxygen sensor?
1 Answers
The voltage range of the rear oxygen sensor is between 0.1V and 0.9V, with an average value of 0.4V to 0.5V. This data is primarily used to provide feedback to the ECU for comparison, ensuring the proper functioning of the three-way catalytic converter. If the voltage frequency changes more rapidly, it indicates a better sensor performance. If the voltage remains at 0V or 1V, or shows no variation, it suggests that the rear oxygen sensor has significantly aged and requires immediate replacement. In case of abnormal voltage readings (indicating a fault), the ECU will fail to receive certain feedback signals, triggering the OBD (engine exhaust system) warning light on the car dashboard. Immediate repair at an auto repair shop or 4S store is necessary in such cases.