PO143 Code

[wellsey66]

Code PO143 comes up when I read the odb2,and reads as follows-02 Circuit Low Voltage (Bank 1,Sensor 3) I think this indicates a bad 02 sensor but I dont know what one,as there are three.99 safari AWD Thanks

[gtkane]

Sensor 3 is behind the converter. It is used to moniter the converter's performance.
If you have removed the converter, it will pop this code.
If not, and it is running good, you will need a new O2 sensor.

[wellsey66]

Thanks

[phrog]

Also if you are driving thru slush in the winter and throw up a bunch of slush it will cool this heated sensor and pop that code. If it goes off after a few on/off cycles I would just clear it by taking the battery cables off and shorting them together. The newer vans have a capacitor that will hold codes in memory if you just remove the neg cable, also the cheap code readers like at autozone won't clear them anymore.