Question about 2000 Pontiac Grand Am GT

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Having trouble figuring out which color wire goes to which color wire , hooking up the rear 02 sensor

Wires from the engine do not match the ones going to the 02 sensor at all

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  • sbmartin9 Aug 02, 2008

    Thank you very much for your knowledge and insight to this problem , it really did lead me into the right direction



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  • 17 Answers

Yeah..the O2 sesor is made by DELPHI. Call the GM parts counter guy at your local dealership ....they want to sell parts and usually cough up the answers you need so you buy the part from the dealer...then just go to advance or NAPA and get what you need for 1.3rd the price...I am not trying to be dishonest, just looking out for your wallet.

Posted on Aug 01, 2008


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1 Answer

What wire from the engine harness grey or brown goes to the blue signal wire on the 02 sensor

posted now 3 times.
no engine stated (of the 3)
no symptoms stated. or job.
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on your other post, i answred for all 3 engine
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go back and read. your other posts.

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Igot universal lambda sensor for suzuki liana whant to change the plug from my old one but colores are different

that is correct, all 02 makers use there OWN colors
there is NO STANDARD there, or for the car harness, either.
to cut a fat hog and not buy PNP sensors
you agreed, (by default) TO HAVE a FSM schematic
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car heater to any sensor heater wire, other one.
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tell full car spec, to me, year and engine size
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done 100s.

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if a BOSCH , IS IT?
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or wires cut. 02 sensor can have bad service and the wires put back wrong and then hit the 2000F hot exhaust, pipe there, and get destroyed. so looking is fire.
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this 138 can set if the inside of the 02 heater melts and then shorts to the CELL pin (OXY output) causing illegal output there.
or the wires are shorted there.

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The two white are the heater
The black the ground
The gray the O2 Sensor output,
you back probe to check Voltage
& Switching Times

The vehicle wiring harness does not have to match
the sensor, BUT -- you need to have the same
connector on the sensor

If you have a universal cut & splice, you have junk,
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Get a Bosch or NGK, OEM sensor & just
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I have the 4.2 V8. A tech has supplied me with the DTC P1646 code, bank1 sensor1 oxygen sensor failure. My question is two part; first where is the sensor located on my car and two which sensor shoud I...

Look at both cylinder heads, the one closes to the front of the engine is bank one, the sensor will be the one that sits on the exhaust manifold or right after it. If you can find an 02 sensor made by Bosch good brand, just one thing if it's generic you will have to put the wire' into the plug for the 02 sensor and some times the wires are not the same color to match with the harness, some time going OEM is the best way,Good luck

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does this model have the built in amp? brownred may be the clock. do you know what each of the wires on the stereo controls? if you know this i can help you.

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1998 dodge ram 1500 4x4 stereo wiring

glad you posted what colors you do have , cause 2 resources didn't match ,actually 3 , i did find a match to your colors was a 97 year model premium radio, so we have a match .....

black/ light green = ground
dark green = left front spkr +
purple = right front spkr +
blue/white = right rear spkr -
brown/blue = left rear spkr -
brown/yellow = left rear spkr +
blue/orange = right rear spkr +
black/yellow = park lamps
brown/red = left front spkr -
orange = dimmer signal
pink = fused battery +
green/red = radio choke relay
red/white = fused ignition
blue/red = right front spkr -


djmac62 is also an excellent answer

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