Wide band sensors (often referred to as UEGO sensors, for Universal Exhaust Gas Oxygen, or linear lambda oxygen sensor) generate an indication of the oxygen content in the exhaust gas mixture. Some modules provide UEGO inputs processed by Bosch CJ125 ASICs. The OpenECU platform provides an interface to control the CJ125 device:

UEGO sensors require careful control of the heating element to avoid damaging the ceramic heater, and careful control of the pump cell current to accurately measure the oxygen content. See the modules technical specification document for more details.