How much is the resistance of oxygen sensor normal?

About the normal range of oxygen sensor resistance: 1. The resistance value of oxygen sensor is usually between 0. 1 and 0.9. The fluctuation range of the rear oxygen sensor will be smaller than that of the front oxygen sensor, but the value of the oxygen sensor will be different according to the brand, model, year and emission requirements. Depends on what model you are. 2. The front oxygen sensor is installed in front of the three-way catalytic converter to correct the fuel injection quantity. Once the air-fuel ratio of the mixture deviates from the theoretical air-fuel ratio, the purification ability of the three-way catalyst for CO, HC and NOx will drop sharply. Therefore, an oxygen sensor is installed in the exhaust pipe to detect the oxygen concentration in the exhaust gas and send a feedback signal to the engine computer, and then the engine computer controls the increase or decrease of the fuel injection quantity of the fuel injector, so that the air-fuel ratio of the mixture is controlled near the theoretical value (14.7: 1).