'99 CR-V

I lowered my exhaust to drop the oil pan for a new gasket and it slipped and pulled the O2 wires from the Plug the wires were inserted into.

I have 2 Black wires
1 Green Wire
1 White Wire

The image is the O2 Sensor end of it's connector looking "up"

Could anyone tell me what each color wire pushes into each round hole please (using the numbers below)?

For the sake of labeling lets call the Upper Left in the image #1
Upper Right in the image #2
Lower Left in the image #3
Lower Right in the image #4

Thanks,
Bob

 

Best Guess, top two are sensor or signal the green and white wires
Bottom two are the heater wires
Check by looking at the wiring of the other connector which this plugs into.

Usually when the wires are pulled out of a connector, it means the pins holding the wires let go
The pins may still be in the connector. If this is so then will need a small pick tool to free them and pull them out
Manipulate the pins to release and then put wires into pin then crimp.
Re-insert pin into the connector. The wires usually do not just push back in.

Anyway, should be able to decipher which wire goes where.
The two black are usually on the bottom two
Heater wires. So one is hot and the other ground.
No polarity is observed.
Signal wires are different.
One is signal and the other is signal ground
Polarity needs to be observed

Good luck

 

Thanks-

 

I just don't have the schematics.

So it looks like you got lucky and the pins are still attached to the wires
The two black wires should be the heater circuit
Put an ohm meter on them. Should read between 2 to 14 ohms when cold.

The white and green wires are the sensor signal and ground
O2 sensors produce a voltage. Read up on how O2 sensors work??
O2 sensors produce between 0.1 to 0.9 volts (at around 600 degrees F)??
Heater circuit needs power??
Should be able to distinguish between the two circuits on the upper connector??
Using a multimeter??
The O2 sensor will throw a code if not connected right??
Clear code and reverse wires??

 

If all else fails, I may go to an auto parts store to see if they will let me look at a brand new O2 sensor
to see if that solves the puzzle, though after market O2 sensors often use different colors for the
wires between the sensor and plug, and that may further confuse things. We'll see.

Thanks-

 

Yeah, go to an auto parts store and ask for the sensor
Then ask to see the part
Collect the information you need
Then thank them for their help and say you will think about it
Should be able to get a good idea of the placement of the wires

 

I'l even visit my Honda dealer since the OEM part may have the same wire colors my original one has.

I need to schedule for my passenger air bag replacement under the recall as they FINALLY have the parts available. A good excuse to darken their door.

I just would prefer to do the job ONCE and maybe not chance damage to my ECU.

 

OK-

Visited Honda Dealer. Checked with Parts Department and he was very helpful, but they did not stock the parts and said I would have to ORDER them, and then refuse them (10% re-stock fee). The price for EACH O2 sensor is $591.72 or $1184 roughly and 10% (plus 9.3% tax on the restock fee) would be $130 jut to LOOK at them.

Went to the Service Dept to schedule Air Bag recall, and the Service Writer was VERY nice and called out her master tech, who was nice enough to pull the Service Manual that showed the full schematic and while it did not show the O2 wire colors AT the O2, it showed the colors of the harness wires with polarity so I could deduce for SURE that Green was sensor Ground and White was sensor Hot, so below is the color code looking at the pin end of the O2 Plug if anyone needs it in the future.

Hopefully it will help someone that does a dumb thing like I did in the future!

BTW, the pins pushed easily back through their connector holes and it was easy to line up the flat metal pins in the proper holes in the connector body. There did not appear to be any "catches" or retaining method other than each wire having a silicon rubber seal on it that is a tight fit in the connector block passage.

 

Good news
Thanks for coming back and posting the fix
Sure it will help someone

BTW, nearly $600 dollars for an O2 sensor is outrageous.