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Diode for PLX wideband o2
Posted: Thu Feb 18, 2021 8:40 pm
by Furble
One of the tech articles reads: “Check the voltage value with a multimeter at the output of the wideband and see how it compares to the O2 voltage above. If there is a difference, install a diode with the diode cathode pointing to the FJO and the anode pointing to the the O2 plug (green sensor ground wire) The diode is type 1N4001, Radio Shack part # 276-1101. This prevents what is called a ground loop.”
Question: Is the same diode valid for the PLX wideband?
Re: Diode for PLX wideband o2
Posted: Thu Feb 18, 2021 8:58 pm
by Furble
Since it will probably be asked, the plx IS grounded direct to the thermostat housing and the voltage offset is very small. Curious if I could get it down to zero and perhaps this diode trick would accomplish that.
Re: Diode for PLX wideband o2
Posted: Fri Feb 19, 2021 10:46 am
by Spunkster
define very small
Re: Diode for PLX wideband o2
Posted: Fri Feb 19, 2021 5:11 pm
by Furble
-0.04 volts
Re: Diode for PLX wideband o2
Posted: Fri Feb 19, 2021 5:12 pm
by Spunkster
Don't worry about it.
Re: Diode for PLX wideband o2
Posted: Fri Feb 19, 2021 5:17 pm
by Furble
Roger that.