O2 sensor

loveMy850 · Post by **loveMy850** » 03 Sep 2020, 12:28

I know I'm not suppose to Yell H elp, but oh my God my O2 sensor wires on the adaptor end towards the engine came out and these are all green wires except for 1 black wire. It looks like I can stick them back up in the adapter but I don't know where the wires go correctly. My O2 sensor is in connected and fine, what do I do????? The sensor wires are BLK white grey and maybe another white. Please......!

Post by **RickHaleParker** » 03 Sep 2020, 13:41

Two of the green wires should have stripes One stripe is gray and the other is black.
The two White wires on the sensor side are the heater. Polarity does not matter.

ECM to O2 Sensor.
Green-Gray to Gray. (Sensor (-) in ECM).
Green-Black to Black. (Sensor (+) in ECM).

Green to White. ( Heater (+) in ECM, shared with fuel injectors and others).
Black to White. ( Heather (-) in ECM ).

loveMy850 · Post by **loveMy850** » 04 Sep 2020, 07:08

Are you sure it's running rich and not idling property

Post by **abscate** » 05 Sep 2020, 02:56

If it didn’t plug and play into the Volvo harness, it’s probably a junk OXS which won’t work well.

You can confirm Ricks wiring in the wiring diagram ( findable on the web, not hosted here by agreement with Volvo) as Rick is wrong approximately 0.00000850% of the time

Post by **RickHaleParker** » 05 Sep 2020, 04:26

1994 850 EWD is document TP3903202 .

loveMy850 · Post by **loveMy850** » 08 Sep 2020, 21:07

Hi Rick, I have to buy a new harness, I have to get the pins and I'm wondering what size pins they are, I don't like wiring of any kind after have the s**t shocked out of me years ago. Male and female are the pins, which goes into which wires. Thank you ..

loveMy850 · Post by **loveMy850** » 08 Sep 2020, 21:14

Hi Rick, I have to buy a new harness, I have to get the pins and I'm wondering what size pins they are, I don't like wiring of any kind after have the s**t shocked out of me years ago. Male and female are the pins, which goes into which wires. Thank you ..it's not the sensor it's the harness... The pins are bad, bad connection, did a code reading and got 212 it needs repaired badly.

loveMy850 · Post by **loveMy850** » 09 Sep 2020, 08:42

loveMy850 wrote: ↑04 Sep 2020, 07:08 Are you sure it's running rich and not idling property

loveMy850 wrote: ↑08 Sep 2020, 21:14 Hi Rick, I have to buy a new harness, I have to get the pins and I'm wondering what size pins they are, I don't like wiring of any kind after have the s**t shocked out of me years ago. Male and female are the pins, which goes into which wires. Thank you ..it's not the sensor it's the harness... The pins are bad, bad connection, did a code reading and got 212 it needs repaired badly.

loveMy850 · Post by **loveMy850** » 09 Sep 2020, 08:44

I'm unsure which pins to buy are they certain pins size, make all that stuff? Male female, it looks like they were just yanked out, I don't know whats going on, the harness that holds the pins to the wires to the engine, please can you help me..

Post by **abscate** » 10 Sep 2020, 02:10

What year and model engine are we talking here??

Maybe someone has an old sensor they can send for the connections ?