What are the effects of unplugging the oxygen sensor connector on a vehicle?
2 Answers
This will prevent the ECU from obtaining this information, making it unable to determine whether the injected fuel quantity is correct. An inappropriate air-fuel ratio can lead to reduced engine power and increased emission pollution. Below is an introduction to the oxygen sensor: 1. Function of the oxygen sensor: The oxygen sensor is a critical feedback sensor in the electronic fuel injection engine control system. It is a key component for controlling vehicle exhaust emissions, reducing environmental pollution caused by vehicles, and improving the fuel combustion quality of the engine. Oxygen sensors are installed on the engine's exhaust pipe. 2. Principle of the oxygen sensor: It uses a ceramic sensitive element to measure the oxygen potential in the vehicle's exhaust pipe and calculates the corresponding oxygen concentration based on chemical equilibrium principles, thereby monitoring and controlling the combustion air-fuel ratio to ensure product quality and compliance with exhaust emission standards.
I encountered this issue when I first opened my auto repair shop. After unplugging the oxygen sensor connector, the vehicle's performance changed significantly. The sensor is designed to monitor oxygen levels in the exhaust pipe, allowing the engine control unit to adjust the fuel-air mixture for optimal combustion. Once unplugged, the ECU loses its signal source and switches to a preset mode, commonly known as limp mode. The car then drives as if dragging a leg, with sluggish acceleration, limited RPM, and a poor driving experience. What's more annoying is the surge in fuel consumption. Last month, I helped a customer whose fuel consumption jumped from 7 liters to 10 liters per 100 km, costing him hundreds more in fuel. Emissions also exceed standards, with black smoke billowing out, which is bad for the environment. Over time, other components like the catalytic converter can get damaged. So, don't mess around—if there's a sensor issue, replace it promptly to save money and hassle.
