How to solve the P0131 fault code?

[VonAlina]

P0131 fault code solution: Replace with a new oxygen sensor. The P0131 fault code indicates a damaged oxygen sensor. Cars are equipped with oxygen sensors, which are installed on the exhaust pipe. There is one oxygen sensor in front of the three-way catalytic converter on the exhaust pipe and another one behind it. The front oxygen sensor is mainly used to detect the oxygen content in the exhaust and sends the signal back to the ECU, which can adjust the air-fuel ratio based on this signal. The rear oxygen sensor is primarily used to check whether the three-way catalytic converter is functioning properly. The oxygen sensor is a standard component in cars, utilizing ceramic sensitive elements to measure the oxygen potential in the exhaust pipe and calculating the corresponding oxygen concentration based on chemical equilibrium principles. It serves as a measuring element to monitor and control the combustion air-fuel ratio, ensuring product quality and compliance with exhaust emission standards.