lambda sensor suitable for your car

Oxygen sensor for cars: find out more! How to choose, when to change , and how much they cost

A lambda sensor is a sensor which measures the residual amount of oxygen in the exhaust gases. It allows determining the air-fuel ratio of the mixture. The engine control unit uses data from this sensor to adjust the process of mixture formation in real-time.

Types

By design, these parts are divided into:

1. Binary. These sensors can be made of zirconium or titanium. The former type is the most common. Their working temperature is 300°С. Therefore, such devices need some time to heat up and don’t begin working immediately after the engine start. The latter type is durable longevity and requires no atmospheric air for operation. That is why they are often installed on off-roaders, as they can operate even underwater, for instance, when crossing bodies of water.
2. Wideband. Their design features two sensitive elements. Such sensors ensure more accurate readings. However, temperature variations and condensed water are detrimental to them. The vehicle OBD system monitors this type of sensors; you can read the fault codes with a special scanner.

By the presence of a heating element, there are the following types of lambda sensors:

1. With a heating element. They last for about 100.000 kilometres. They feature a built-in heater, that’s why they are more efficient and start operating faster.
2. Without a heating element. Such sensors are designed for 50.000–80.000 kilometres of mileage. They reach the working temperature due to contact with hot exhaust gases. Nowadays, they are used less often, as they take quite a lot of time to heat up.

Depending on the type of housing, these components can be threaded or flanged. Moreover, some of them are sold with the connector, while others use the connector of the old part.

Operating tips

To avoid engine malfunctions, it is recommended to check the lambda sensor every 30.000 kilometres of mileage or every time you have your car serviced and emissions tested. Fill up at proven petrol stations only: vapours of leaded petrol damage the sensitive element of the device. For the same reason, it is not recommended to use silicone-based sealants for mounting exhaust system elements.

Also, try to avoid exhaust system overheating. Properly adjusted and correctly working ignition system is essential for this.

When installing a new oxygen sensor, carefully follow the instructions of its manufacturer and recommendations of the carmaker. Always clean the mounting location. Tighten the threaded joint with a torque wrench and observe the required tightening torque. Some manufacturers recommend greasing the thread. Just don’t let the lubricant get onto the sensitive element of the part.

Symptoms of malfunctions

Usually, all defects of oxygen sensors have the same symptoms. They are reduced engine power and performance, poor acceleration, increased fuel consumption, unstable idling. Sometimes, you might even hear a specific cracking sound near the part location after you stop the car.

Causes of malfunctions

Malfunction of the sensitive element is mostly caused by the formation of carbon deposits on its surface. This occurs when you use additives not allowed by the vehicle manufacturer, or if the engine rotating assembly is worn out, the piston rings and valve oil seals are damaged or the crankcase ventilation system is clogged. Moreover, the sensitive element of the lambda sensor may burn out if the fuel keeps burning in the exhaust system. Wiring malfunctions are often caused by voltage variations in the vehicle mains. Also, wires abrade over time.

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You can buy a lambda sensor and other spare parts at a good price from us. A wide product range and convenient catalogue will help you to choose the components you need quickly.