Lambda Probe (7/15, 7/82, 7/104, 7/167, 7/285) [2019-2022]: Description
The lambda probe is used to measure the remaining amount of oxygen content in the exhaust gases. It helps to govern the air to fuel ratio.
The lambda probe consists of an oxygen sensor and a heater element. It has a linear broadband function and is made with a zirconium probe. The sensor needs a reference from the surrounding air and the surrounding air reaches the oxygen sensor via its cabling. The sensor needs to be heated in order to function properly and is electrically preheated to quickly reach operating temperature. The heating element consists of a PTC-resistor.
The wiring to the heated lambda probe must not be squeezed or in any other way damaged. It is not allowed to grease the contacts of the lambda probe as the oil would interfere with the reference air and the function of the lambda probe. The area where the cable is attach to the body of the lambda probe must be protected from contamination.