air fuel ratio sensor used in cars, model LSU 4.9 boash , controller Chip CJ125 , i have searched alot, lots of info is also available but till now i am not able to understand its basic working principle of this sensor, because i want to use this sensor without the Controller chip, i want 0 to 5 volt output but CJ125 gives data in SPI format.
also i am confused in functions of different pin out of this sensor.

Kindly help
ali

 

Google is your friend. www.bosch-motorsport.com/.../Lambda_Sensor_LSU_49_Datasheet_51.

 

Why are you building one when you can buy a cheap china made one for next to nothing or spend the money and get autometer gauges.

 

wide-band O2 sensors are not that trivial - you need an external controller with a processor to control it and decode the output. Cheap controllers start at about $50, those would provide you with analog 0-5 signal you are looking for.