sfR87quest Posted November 3, 2003 Report Share Posted November 3, 2003 Hi guys...I just wanted to know how you hooked up your 3 wire O2's...I just want to know the easiest way to install this...any feedback would be helpful. Link to comment Share on other sites More sharing options...
Boosted_One Posted November 3, 2003 Report Share Posted November 3, 2003 3 wire O2: 2 white wires 1 black wire 1 white to 12V positive 1 white to negative ground black to gauge unit/ECU Link to comment Share on other sites More sharing options...
gunpackingpoet Posted November 22, 2003 Report Share Posted November 22, 2003 What's the part number to that 3 wire 02 sensor? Link to comment Share on other sites More sharing options...
stariongirl Posted November 26, 2003 Report Share Posted November 26, 2003 What's the part number to that 3 wire 02 sensor? Â bosch 13913. s/g Link to comment Share on other sites More sharing options...
gunpackingpoet Posted November 26, 2003 Report Share Posted November 26, 2003 SG, is there any difference between that one and the bosch 12031? I just got back from autozone and they said it would take a universal O2 sensor (12031). Link to comment Share on other sites More sharing options...
JAinsworth Posted November 26, 2003 Report Share Posted November 26, 2003 GPpoet, I run the same one as stariongirl with no issues. Jimmy Link to comment Share on other sites More sharing options...
gunpackingpoet Posted November 26, 2003 Report Share Posted November 26, 2003 13913 it is. That 12031 I mentioned is a one wire. Thanks! Link to comment Share on other sites More sharing options...
lionbull Posted August 27, 2004 Report Share Posted August 27, 2004 O.K so this means that if you have a car with an AF guage we have to run the black wire to the gauge only or we splice it in half and run one to the gauge and then one to the ECU? 3 wire O2: 2 white wires 1 black wire 1 white to 12V positive 1 white to negative ground black to gauge unit/ECU Link to comment Share on other sites More sharing options...
starquestPilot Posted August 27, 2004 Report Share Posted August 27, 2004 Most of us use the existing O2 wire (from the OEM sensor) to connect the new sensor. Then run a wire from the A/F gauge over to the ECU and splice into the signal from the O2 sensor there... Mike Link to comment Share on other sites More sharing options...
simsima Posted September 11, 2004 Report Share Posted September 11, 2004 hey guys can someone tell me what is the advantage of using a 3 wire 02 sensor other than it warms up quicker. Link to comment Share on other sites More sharing options...
artinist Posted September 13, 2004 Report Share Posted September 13, 2004 you just said it. if you want more accurate readings, go with a 4 wire sensor. Link to comment Share on other sites More sharing options...
simsima Posted September 13, 2004 Report Share Posted September 13, 2004 ok let me rephase that; whats the advantage of warming up quicker will it run better . Link to comment Share on other sites More sharing options...
Ryan_V Posted November 13, 2004 Report Share Posted November 13, 2004 from Kelly- if it warms up quicker and adjusts the start up fuel mixture you won't ruin the cats as fast So if you don't have cats like me...oh well So what's up with the four wire ??? Link to comment Share on other sites More sharing options...
Syth Posted March 12, 2005 Report Share Posted March 12, 2005 I have a question the WHITE wire that goes to 12v positive, can that be connected directly to battery? Or does the 12v need to be switched, and if it needs to be switched, where is a good tie in for it? I am adding a 3 wire on Saturday and just want to get it right the first time, Thanks guys and gals for all the info you all have been a lifesaver a time or two! Link to comment Share on other sites More sharing options...
starquestPilot Posted March 12, 2005 Report Share Posted March 12, 2005 ...can that be connected directly to battery? Â Or does the 12v need to be switched, and if it needs to be switched... Most of us use switched power - it's available at the wiper motor electrical connection... Mike Link to comment Share on other sites More sharing options...
Jozel Posted March 27, 2005 Report Share Posted March 27, 2005 Most of us use switched power - it's available at the wiper motor electrical connection... Mike Would you be able to pinpoint what color code wire it is from the wiper motor ? My car is not running right now and it would be impossible to get a reading coz my battery is shot. Thanks, Joe Link to comment Share on other sites More sharing options...
BuGG Posted March 27, 2005 Report Share Posted March 27, 2005 Use a volt meter. Very easy to figure out. BuGG Link to comment Share on other sites More sharing options...
Sarc Posted April 10, 2005 Report Share Posted April 10, 2005 Could someone please elaborate on the advantages and differences between a 3 wire and a 4 wire? 4 wire wouldn't be wide band would it? Thanks. Link to comment Share on other sites More sharing options...
mikec Posted April 11, 2005 Report Share Posted April 11, 2005 Heated O2 sensors (3 and 4 wire types) start working more quickly and they're more consistent in their readings... O2 sensor output voltage, for a given air/fuel ratio, is also affected by exhaust temp. With a heated sensor this temp sensitivity is reduced. The extra wire in 4-wire O2 sensors is a sensor ground. Rather than using the sensor body for ground - and thus having to go through the exhaust manifold, engine block, etc. to get to the true chassis ground and then to the ECU, 4-wire sensors have a dedicated wire for the ground... just run this straight to the ECU along with the regular signal wire. Now the O2 signal is independent of any poor/noisy engine grounds. The ECU has a more reliable signal to work with. 4-wire O2 sensors need not be wideband; in fact most are not wideband. Wideband sensors have several wires because they have several bits inside them that must be read/controlled properly to get a true reading... thus the expensive electronic controllers for wideband controllers. mike c. Link to comment Share on other sites More sharing options...
JAinsworth Posted February 4, 2006 Report Share Posted February 4, 2006 I found that most cars that come with a 3 wire HO2S have a resistor across the positive and negative for the heating element (to redirect unused power after sensor is up to proper heat). There is no mention of this in the post and the sensor life might be reduced with a constant 12 volt signal to it (especially when it is not needed). Here is a link on how to wire it correctly:http://www.plxdevices.com/AppNotes/PLXApp004.pdf Link to comment Share on other sites More sharing options...
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