Remove O2Sensor

[Mango]

Stuck O2 sensor 200,000 miles on a 89 burb

 

[TotalyHucked]

PB Blaster, PB Blaster, maybe a 3rd day of PB Blaster, drive it to get it good and hot, then more PB and pull it out hot

 

[legopnuematic]

If it’s no good and going to be replaced, cut the end off then put a normal socket on it and try that.

 

[Edelbrock]

If there is room, try getting in there with a mini pipe wrench. Or maybe a basin nut wrench.

 

[Sad Sack]

My O2 sensor tool is a 7/8" 6-point box end wrench, works much better if space permits. Goop up the new one with anti-seize.

 

[Mango]

Hi thanks for the replies
I sprayed it with PB Blaster for a week, drove it to work every day 8 miles each way and keep soaking it.
I feared the worst, Went to the shop put it on the lift disconnected the wire used a special snap on O2 sensor socket one push with the ratchet and it popped off the socket,I thought it rounded over! Nope it was loose came off like butter, No heat, No Cussing, installed the new one all i need to do is take it for a test drive and see if my mileage gets better.

 

[Edelbrock]

Might be worth resetting the computer. Just disconnect the negative battery cable then turn the ignition on for a few minutes. Then the computer will start from scratch and relearn all the inputs, including from the O2 sensor.

 

[Mango]

Computer reset how many miles to re Calibrate

 

[Matt69olds]

You need some serious heat. Got a torch?

 

[Bextreme04]

Computer reset how many miles to re Calibrate

Usually one tank of gas will do it.

 

[Bextreme04]

Hi thanks for the replies
I sprayed it with PB Blaster for a week, drove it to work every day 8 miles each way and keep soaking it.
I feared the worst, Went to the shop put it on the lift disconnected the wire used a special snap on O2 sensor socket one push with the ratchet and it popped off the socket,I thought it rounded over! Nope it was loose came off like butter, No heat, No Cussing, installed the new one all i need to do is take it for a test drive and see if my mileage gets better.

This is the way

 

[Edelbrock]

Computer reset how many miles to re Calibrate

It doesn't take very long. With most vehicles, the values will all set to OEM base settings if you disconnect the battery.

Then after your O2 sensors warm up, the computer will start accepting voltage readings from them as well as the other sensor inputs - and then it will adjust the fuel ratios accordingly. So one drive cycle should do it, as long as the engine gets fully up to temp, and the vehicle gets up to cruising speed.

Every make and model is different, but that's a good general rule of thumb.