Cars - Truck - Bus - Farm Machinery - Construction Equipment - Boats

Back to previous page


What is an oxygen sensor?
The oxygen sensor is also known as O2 sensor or lambda sensor. It is one of the most important components of petrol, diesel and gas vehicle’s emissions system. All vehicles that are manufactured after 1980 include oxygen O2 sensors.


The main purpose of the oxygen sensor is to monitor how much unburned oxygen deposits in the exhaust stream of the vehicle as the exhaust gases exit the engine. It checks if the catalytic converters work properly and the engine runs its best. Oxygen sensors are directly connected to the vehicle’s electronic control unit. That way, if the oxygen levels are too low or too high, the lambda sensors notify the computer and warning check engine light comes up on the dashboard. The upstream oxygen sensor is located on the exhaust pipe, while the downstream sensor is closer to the muffler and catalytic converter. The main idea is the ECU to receive more adequate information and calibrate the engine for better fuel efficiency and performance.

What does oxygen sensor do?
The O2 sensor measures the residual oxygen amount of the exhaust gases. It transmits a voltage signal to the engine control unit when it gets hot and reaches 300°C.
For example, if there is not enough fuel in the mixture, the voltage signal is low. If there is too much fuel, the voltage is higher. The air/fuel ratio is something that is constantly changing because it depends on the engine temperature, load, warm-up period, acceleration, etc. The oxygen sensor voltage helps the vehicle’s computer to regulate the amount of fuel and to achieve an optimum mixture.

How to know if the oxygen sensor is faulty?
This usually happens when the dashboard warning light comes on, also have symptoms that can help you will help you to notice if there is a problem with your lambda sensor.
  • Poor engine performance 
  • Poor idling 
  • Black smoke from the exhaust 
  • Increased fuel consumption
Removal and delete of the lambda sensor
The oxygen sensors become caked with sulfur, lead, fuel additives, and oil ash and fail. In addition, they work under extremely high temperature which damage the heater element of the sensor. When oxygen sensors fail, they stop reading the exhaust gasses correctly. This can overheat the converter far above normal operating conditions and lead to a meltdown of the catalytic converter.
Deletion and removal is done by programming the engine control module (ECU)

Is it legal to remove oxygen sensors?
There are cases where it is necessary to completely remove the oxygen sensors. Complicated repairs in which to find the problem it is necessary to temporary removal of the oxygen sensors temporary, competition vehicles, special purpose vehicles, etc.

The removal of the oxygen sensors is at the customer's discretion!
Chip Cars offers global software modification services in various countries around the world. The user must consult the legal regulations in their country.