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Replace Oxygen Sensors - How to

 
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2001Ls
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PostPosted: Thu Jun 30, 2011 12:08 pm    Post subject:  Replace Oxygen Sensors - How to Reply with quote

I'm trying to do a tune up on my car. I bought a up stream and down stream 02 sensor but I cant find any info here or how to. Any tips or links?

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chibiblacksheep
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PostPosted: Thu Jun 30, 2011 12:35 pm    Post subject:   Reply with quote

(This is from memory for Bank 1)

Run the car for a few minutes to get the rear exhaust manifold warm. (helps loosen the o2 sensor)

I rocked my engine forward to get more room.

Unplug the negative terminal on the battery.

Disconnect the plug for the o2 sensor from the wiring harness, pull out the christmas tree plug from the bracket it is mounted to.

Using a high quality O2 sensor (since cheap ones can bend) connect to the O2 sensor, using a few socket extensions and a wrench to make a cheater bar prepare to give it some muscle.

When you break it free, follow with a thread chaser to clean it all up so the new one seats well.

Install and torque the new o2 sensor to 35 (36?) ft/lbs.

Plug the new o2 sensor in to the harness, and clip the new christmas tree to the bracket.

Reinstall negative battery terminal (or leave unplugged for a while to reset the PCM to learn readings from the new o2 sensor)

(For the Bank 2)

Basically the same, but good luck if you have the stock downpipe. U-Bend is a B**** to work around.

I honestly wouldn't even change it unless you are running a P0420 code and you know your cat isn't bad. That sensor does nothing but monitor your Cat.

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PostPosted: Thu Jun 30, 2011 2:22 pm    Post subject:   Reply with quote

i just recently did my up stream sensor. i did it without rotatiing the motor by using a wrench and vice grips. not recomended but it worked. if i could find my post i would try to help more

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2001Ls
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PostPosted: Fri Jul 01, 2011 9:33 am    Post subject:   Reply with quote

And once again I buy parts for my car and can't put them on Sad. I need a friend with a lift and impact tools bad.

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PostPosted: Fri Jul 01, 2011 10:47 am    Post subject:   Reply with quote

Why can't you put them on yourself? Sure a lift and impact tools are nice, but you can get by on most repairs without them.

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chibiblacksheep
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PostPosted: Fri Jul 01, 2011 11:19 am    Post subject:   Reply with quote

I spent a good amount of time writing that! Sad

Why can't you do this yourself? I changed the bank 1 with the car on the ground.

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PostPosted: Tue Jul 19, 2011 12:52 pm    Post subject:   Reply with quote

chibiblacksheep wrote:
(This is from memory for Bank 1)

Run the car for a few minutes to get the rear exhaust manifold warm. (helps loosen the o2 sensor)

I rocked my engine forward to get more room.

Unplug the negative terminal on the battery.

Disconnect the plug for the o2 sensor from the wiring harness, pull out the christmas tree plug from the bracket it is mounted to.

Using a high quality O2 sensor (since cheap ones can bend) connect to the O2 sensor, using a few socket extensions and a wrench to make a cheater bar prepare to give it some muscle.

When you break it free, follow with a thread chaser to clean it all up so the new one seats well.

Install and torque the new o2 sensor to 35 (36?) ft/lbs.

Plug the new o2 sensor in to the harness, and clip the new christmas tree to the bracket.

Reinstall negative battery terminal (or leave unplugged for a while to reset the PCM to learn readings from the new o2 sensor)

(For the Bank 2)

Basically the same, but good luck if you have the stock downpipe. U-Bend is a B**** to work around.

I honestly wouldn't even change it unless you are running a P0420 code and you know your cat isn't bad. That sensor does nothing but monitor your Cat.

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2001Ls
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PostPosted: Tue Jul 19, 2011 10:59 pm    Post subject:   Reply with quote

Thank you for the write up. I think this is another one of those things where I got a bit over confident as I am by no means car savvy or skilled. I might just take it to my mechanic. Thank you again though, somebody will find this useful, or possibly I get the gusto one day to try it.

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PostPosted: Sat Jul 23, 2011 8:18 pm    Post subject:   Reply with quote

I was surprised today too find that my O2 sensor was only on hand tight. Confused

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