c02 sensor

can anyone tell me if the co2 sensor on the euro and aussie models acts as a autotune ?
sorry if this has been asked before

stevo66 wrote:

can anyone tell me if the co2 sensor on the euro and aussie models acts as a autotune ?
sorry if this has been asked before  

Hi Stevo, a bit of a bump but hopefully you will get a notification.

From my testing the O2 sensor responds to the exhaust oxygen content but the ECU does not use this at all in any way. O2 sensors should operate in a feedback cycle with the ECU, but sadly my o2 sensor was static.

"When warm. You can test the O2 sensor on a vehicle by first identifying the signal wire on the sensor. Secondly, by using a voltmeter with the scale set to 1 volt, the voltage will fluctuate between 200 and 800 millivolts or .2 to .8 volts on your meter. If the sensor’s reading is stalled in position, or switches abnormally high or low, your sensor has failed"

My testing on my WR250R:
Always when cruising in what should be closed loop conditions 0.93-0.95v (max rich measurement possible).
Voltage went down when decelerating. To around 0.3-0.4v.

This would indicate running too rich all the time.

It might be that my bike is the odd one out - it'd be awesome if you still have the bike if you could measure yours.

Thanks