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A lambda sensor, also known as an oxygen sensor, is a critical component in the automotive exhaust system that measures the level of oxygen in the exhaust gases. It typically consists of a sensing element made from zirconia or titanium dioxide, which generates a voltage signal based on the oxygen concentration. This information is used by the engine control unit (ECU) to optimize the air-fuel mixture for efficient combustion and reduced emissions. Lambda sensors are essential for maintaining engine performance and compliance with environmental regulations.
| Material | Zirconia or titanium dioxide |
| Operating temperature range | -40°C to 900°C |
| Response time | Typically less than 100 milliseconds |
| Voltage range | 0 to 1 volt |
| Connector type | Varies by application, often 4-pin or 5-pin |
When selecting a lambda sensor, consider the specific vehicle model and engine type, as compatibility is crucial. Check for OEM specifications, including grades and tolerances, to ensure optimal performance. Certifications such as ISO or OEM standards may also be important for regulatory compliance. Additionally, specify the quantity needed, as bulk purchases may offer cost savings.
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It measures oxygen levels in exhaust gases to optimize combustion.
Symptoms include poor fuel economy, increased emissions, or engine performance issues.
Yes, there are narrowband and wideband sensors, each serving different applications.
Yes, but it requires basic mechanical skills and tools.
Ensure compatibility with your vehicle, check specifications, and look for quality certifications.
They generally last between 60,000 to 100,000 miles, depending on usage and conditions.