1. Incorrect Air-Fuel Mixture: The primary function of an oxygen sensor is to monitor the amount of unburned oxygen in the exhaust gas and relay this information to the Engine Control Unit (ECU). When the sensor is faulty, it may provide inaccurate readings, causing the ECU to adjust the air-fuel mixture incorrectly. This can result in either a rich mixture (too much fuel) or a lean mixture (too much air). Both conditions can lead to loss of power.
2. Reduced Fuel Efficiency: A faulty oxygen sensor can also affect the vehicle's fuel efficiency. When the air-fuel mixture is not optimized, the engine needs to work harder to generate the same amount of power. This can lead to increased fuel consumption and reduced overall efficiency.
3. Engine Hesitation or Surging: A faulty oxygen sensor can cause the engine to hesitate or surge during acceleration. This is because the incorrect air-fuel mixture affects the combustion process, leading to inconsistent power delivery.
4. Check Engine Light Illumination: In most cases, a faulty oxygen sensor will trigger the Check Engine Light on the vehicle's dashboard. This light is designed to alert the driver of potential issues in the engine's emission control system, and it should be addressed as soon as possible.
It's important to note that while a faulty oxygen sensor can contribute to loss of power in a 2001 Hyundai Santa Fe, it's not the only possible cause. Other issues such as ignition system problems, fuel injector issues, or vacuum leaks can also lead to similar symptoms. Therefore, a thorough diagnosis by a qualified mechanic is necessary to identify the exact source of the problem.
