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Wire color codes for the oxygen sensor - Accent Hyundai Cars & Trucks

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I went to the factory web sight and read the electrical trouble shooting diagram for the o2 sensor.

Posted on Jul 22, 2008

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SOURCE: Oxigen sensor 4-wires /colore of signal wire

most of the times the signal wire is the black one,
but is definly not the red or the red with stripe,
so is eithr the white or the black.

Posted on May 28, 2008

  • 36 Answers

SOURCE: upstream oxy. sensor signal wire, what color is it?

In my 1990-1995 manual it is Black/Dark Green.

Dark green/orange is 12 V supply, Black is ground, Black/Light Blue also comes from the powertrain control module but is common to many other sensors.

Posted on Dec 28, 2008

jyeager178
  • 2 Answers

SOURCE: oxygen sensor 1999 hyundai accent

Bosch website........free

Posted on Mar 31, 2009

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SOURCE: need color code for wiring harness for 2001 honda accord!

check out http://www.hondahookup.com/manuals/

Posted on Sep 12, 2009

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SOURCE: on a Delphi 5 wire oxygen sensor, what do the

Are you sure you got right o2 sensor.Because on Delphi 2 it connects 4 wire.It requires 4-wire o2 sensor to connect on Delphi 2 models.

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Are you confirm, that 5 wire o2 sensor is for Delphi 2.It will not support.As there are 2 heaters on Delphi then only 4 wire o2 sensor will work.On the engine model, where there are 3 heaters on that models 5 -wire o2 sensor connects.-----------

As per Delphi manual.You have got improper o2 sensor.---------

Your sensor should have 4 wire in o2 sensor.

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Delphi 2 o2 sensor wire color:-- Black ,Grey , Purple and Purple.

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And in that black is signal wire, grey is ground wire ,one purple wire to first heater and second purple wire to another heater.There are two heater in Delphi 2.-----------

The two heater wires, these are always the same color. ------- On 3 heater engine the heater wires are of different colors.

On 3 heater engine the wiring is as follows:---

oxygen sensor wire black, grey, purple, white, and brown.

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Black is signal, grey is ground, and remaining 3 wires purple white and brown goes to heater.

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I suggest get exact o2 sensor.--------

Because if you dont connect 1 wire from your 5 wire o2 sensor then it may not detect.----

Still you can try connecting 5 wire sensor as per 4 wire sensor and see if that helps.

leave any of the one purple or white unplugged and see if that is helping.but i dont think so, it will work.---------

Correct sensor is required.

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This should help.thanks.Helpmech.

Posted on Jun 16, 2011

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What color wire coming off the engine harness grey or brown connects to the blue signal wire on the 02 sensor which color is the signal wire to the computer


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O2 sensor wiring digram


The figure shared represents the wiring color code, Number of fuses and Power rating. Along with oxygen sensor wiring, the figure shows entire electrical wiring for 94-95 Buick LeSabre.

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2001 Cadillac Deville oxygen sensor wiring diagram


The wiring diagram shows the wiring color code, Power rating and connector plug used. The wiring diagram explains the vehicle's electrical connections with color code. It's a bit complicated to understand.

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2007 Chevy Tahoe check engine scan codes: P0030, P0053, PO135 ~ Please advise or help : ( thought that advanced auto would have been a bit more helpful than handing me a piece of paper with codes and...


There is a fault with the inbuilt heater in the oxygen sensor, before the catalytic converter, on the exhaust pipe the same side of the engine as cylinder 1. The oxygen sensor has four wires within the cable sheath to the top of it. Two of the wires will share the same color. These wires supply power to an internal heating element wire within the sensor. Follow the cable from the oxygen sensor to the connector, you can do a lot testing here. Check the resistance between the two 'same coloured ' wires. The resistance is low, somewhere between 1 and 10 ohms. If there is no continuity (infinite resistance) then this is the fault and the sensor needs to be replaced. The codes: P0030 the oxygen sensor heater relay is at fault P0053 Oxygen heater resistance error P0135 Sensor 1 bank 1 error You are looking at replacement. A further confirmation take the connection from sensor 1 bank 1 and swap it with the sensor 1 bank 2 on the other side of the engine. The codes should 'transfer' and show P0036; P0059 and P0141.

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Replaced the O2 sensor unit and the ECM(programs installed) but I'm still getting CHECK ENGINE LIGHT(P0001). what is the possible problem and how can this be resolved?


P0001 Fuel Volume Regulator Control Circuit/Open The above code is about an oxygen sensor code for the heater circuit located in bank 1 sensor 1. (bank 1 is at exhaust manifold by the #1 cylinder head, bank 2 is on the 2nd cylinder head. On some engines, both exhaust manifolds could have one oxygen sensor each side and the 2nd cylinder head will have the sensor 2). On the oxygen sensor itself, it has 4 wires which are color coded. Two of wires are for the heater circuit that heats the oxygen sensor to make it reach optimum operation quickly. Those 2 oxygen sensor heater wires could be shorted between the sensor and the ecm (engine computer) or other engine components.
oxygen%20sensor%20heater%20copy.jpgThe common fix for this code is to check the integrity of the heater wires. Check the wires for insulation and routing which could be loose or touching a hot exhaust that can short the wires. If the engine has too many miles, it is possible that the heater circuit inside is worn and shorted which needs a replacement of the oxygen sensor. If you have a DVOM, you can also test the continuity of the heater wires from the oxygen sensor to your computer pins.
More detailed fixes will be provided as soon as you give the symptoms of the obd2 trouble code. ATS will provide the wiring diagram so you can trace the color coded wires. Use an obd2 code reader or scanner so you can access this obd2 trouble code. When you have this obd2 code list, use it as a reference and give the code to ATS. We will then send you all the possible fixes for the obd2 trouble code. ATS has lots of fixes for obd2 gm codes, obd2 ford codes, dodge obd2 codes and all obd2 import codes such as Toyota obd2 codes, Honda obd2 codes, Nissan obd2 codes, etc. All fixes for this obd2 codes are guaranteed or your money back.
Important TIPS about Oxygen sensor:
The oxygen sensor content of the exhaust gas indicates when the engine mixture is operating lean or rich. When the oxygen sensor detects that the engine is operating rich, the signal voltage is high, and any decreases in the signal voltage means the engine running is lean. The engine computer supplies a reference voltage like one volt or five volts, and then shows the change in the sensor return voltage as the sensor's resistance is changing. If you have connected everything properly, when you crank the engine, you should see the check engine light coming out.
Unheated oxygen sensors rely on the heat of the exhaust gases to reach the working temperature, therefore they might start to cool down while the engine is idling and revert back to a default air-fuel ratio setting. This type of sensor usually has a single wire connector, though others have two. Unlike the fuel pump relay, the 02 sensor heater circuits have a separate fuse for each sensor and grounds, which are controlled by the engine computer.
To read a voltage across the heater, one side must be connected to (+) and one side must be connected to (-), which is accomplished by the computer or a transistor. It can read 12V between each wire and a separate ground if it was connected to positive and the other was not yet connected to ground connection (for details, please contact ATS).after you replace oxygen sensor you have to drive for so many miles before it resets its sef

Dec 13, 2010 | 2001 Volkswagen Beetle

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Scanning codes


Oxygen sensor response not as expected.Oxygen sensor response slower than minimum required switching frequency,code P0139 may mean that one or more of the following has happened:
  • The oxygen sensor is faulty
  • The wiring to the sensor is broken / frayed
  • There is an exhaust leak
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    • Check for wiring problems (shorted, frayed wires)
    • Check the frequency and amplitude of the oxygen sensor (advanced)
    • Check for a deteriorating / contaminated oxygen sensor, replace if necessary
    • Check for inlet air leaks
    • Check the MAF sensor for proper operation ,I hope this helps

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1 Answer

Oxigen sensor 4-wires /colore of signal wire


most of the times the signal wire is the black one,
but is definly not the red or the red with stripe,
so is eithr the white or the black.

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