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O2 Sensor wires, Need Help!
2000 Honda Civic DX Auto.
Bought NEW O2 Sensor from Pepboys Bosch Universal! New O2 Sensor wire colors Grey Blk Wht Wht Old O2 Sensor wire Colors Grn Wht Blk - wht strip Blk - yellow strip The paper only tells you how to connect 3 wires Grey to Green, Black to White and white to Black....so which white to which black?:confused: Also do I have to connect to a computer to remove the "check engine" light or can I just remove the under the hood fuse 7.5amps for 4 mins? Thanks |
It doesn't matter. The two white wires are the heater, they're interchangeable.
Function Old sensor New sensor Sensor out White Black Sensor GND Green Grey Heater circuit Black White Removing the fuse or disconnecting the battery will clear all codes. The ECU will need to recalibrate itself after that, the engine may not idle properly when first started. |
Hey Thanks for the info...
I removed the fuse and after 5 mins replaced it. ..The light came back on after 5-10 seconds! Any suggestions? |
are you able to resolve this?
Originally Posted by aztecaa
(Post 759918)
Hey Thanks for the info...
I removed the fuse and after 5 mins replaced it. ..The light came back on after 5-10 seconds! Any suggestions? |
Unplug sensor, check heater ohms (two black or white wires). Should be 10 to 40 I think. Open circuit or faults to ground means the sensor is bad. Do this with the sensor COLD, measuring ohms on a hot sensor can damage it. If sensor checks OK plug back in turn key on and check that the car is supplying battery voltage to the heater circuit. One heater lead gets battery voltage all the time the key is on and the other one is selectively grounded by the ECU. If you don't have any voltage, check the car wiring.
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Originally Posted by mk378
(Post 765801)
Unplug sensor, check heater ohms (two black or white wires). Should be 10 to 40 I think. Open circuit or faults to ground means the sensor is bad. Do this with the sensor COLD, measuring ohms on a hot sensor can damage it. If sensor checks OK plug back in turn key on and check that the car is supplying battery voltage to the heater circuit. One heater lead gets battery voltage all the time the key is on and the other one is selectively grounded by the ECU. If you don't have any voltage, check the car wiring.
I am not quite sure how to check the ohms. The new sensor has TWO white wires. When I put meter leads negative on one white and positive on the other white it beeps telling me that they are not open, closed circuit reading 4.5. Not sure I checked it correctly. I also checked the bottom one and it reads the same pretty much. What next and thanks for the help! |
UPDATE Oct 17, 2013 DO NOT BUY BOSCH
Okay Guys, I finally got the O2 Sensor issue fixed.
The O2 Sensor I bought from pepboys which was Bosch does not work with my Honda Civic. I read some where that they do not work. So a friend who swapped out his engine gave me his old O2 Sensor and i cleaned it with Carb Spray and installed it. I pulled the 7.5 Fuse in the Engine compartment, waited at least 10 mins before putting back in the fuse. I started the engine and no more "check engine light" I hope this helps others in my situation! I wonder if i will get better gas mileage? |
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