# One Wire Oxygen Sensors

**URL:** <https://community.cartalk.com/t/one-wire-oxygen-sensors/16895>\
**Category:** Maintenance/Repairs\
**Created:** [July 19, 2008, 1:36am UTC](https://community.cartalk.com/t/one-wire-oxygen-sensors/16895 "2008-07-19T01:36:08Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Shakespirit](https://avatars.discourse-cdn.com/v4/letter/s/90db22/32.png) [@Shakespirit](https://community.cartalk.com/u/Shakespirit)\
**Post date:** [July 19, 2008, 1:36am UTC](https://community.cartalk.com/t/one-wire-oxygen-sensors/16895/1 "2008-07-19T01:36:08Z")

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Toyota used to use a one wire Oxygen Sensor. So, does this fit the Zirconia Theory and Patent by BOSCH, or did they use a thermostat or a variable resistor?  
  
  
  
 Or, does anyone care, and can you draw the circuit?