0.5 volt dc battery to fool O2 sensor?

[GasSavers_Erik]

Originally Posted by diamondlarry

You could do it with three equal sized resistors in series. Tap off of the positive of the battery and at the connection between the first and second resistor of the three and you would have exactly 0.5 volts. Then, connect the circuit in series with the wire going to the O2 sensor with the positive going to the ECU side and the negative to the O2 side. You would want to use fairly high value resistors to limit current flow. If you wanted to have some fine adjustment, you could add a variable resistor in the above circuit.

Thanks diamondlarry! But let me double check that I understand how to do this.

So, I have a simple loop with the positive end of a 1.5 volt battery (example AA) connected to three strong resistors in series and then back to the negative end of the same battery.

Then, I run another wire off the positive end of the 1.5volt battery and connect it to the wire that goes to the ECU and I run a wire from the connection between the first and second resistors and run it to the oxygen sensor. So I am forcing the oxygen sensor output in series through this circuit.

Its the resistor junction that I want to double check to be sure I know which one I should use.

The wire that goes to the oxygen sensor, should that be connected between the first and second resistors as viewed from the positive end of the 1.5 volt battery or as viewed from the negative end of the 1.5 volt battery?

Thanks again