O2 sensor

[mirciov]

Has anybody changed the O2 sensor? How hard is it? Can somebody help with sone step-by-step instructions/picture?

[Smileybug]

There are 2 on the NB. Do you know which one you need to replace? There is one before the Cat and one after it.

[mirciov]

the one before, bank 1

[Barriaga]

bank 1(which the nb only has one bank as it is an inline 4 cyl) sensor 1 is located directly behind the top part of the engine. to be specific, it is screwed into the exhaust manifold. you still need to jack up your nb from the front passenger side and there will be a black box that has two nylon 10mm nuts that you must remove in order to unplug the o2 sensors. the front sensor usually have a black connector and a really long wire that is clipped to the side of the sheet metal that runs along there. unplug and unclip and pull the wire to the top so you can use an oxygen sensor socket to remove the sensor. you can take off the black engine cover(that says vw/2.0) but is not neccisary. also, you may want to unclip the coolant overflow hose connected at the(looking at the motor) left rear on top of engine. so you will put your arm through that gap and wrench off the sensor. should take less than 15 minutes. and for females, its usualy easier to stick an arm through that gap and have plenty of room to wrench on that sensor. obviously, installation is reverse of removal.

[mirciov]

thank you.will try to do it this weekend.

[mirciov]

didn't have time to do the change last weekend, but i have a question. is the cable on the new o2 long enough to get to the box under the car?

[Big_V]

I did my O2 sensor this past weekend. If you purchased the direct Bosch replacement ($89.00 at O'Rielly's) the cable is long enough to reach the connector box.

P.S. if you don't have a oxygen sensor socket, a 7/8" wrench will fit as well.

[Smileybug]

Also remember, that there are 2 sensors. I believe they are 2 different lengths so if its too short, you may have gotten the wrong sensor.

[mirciov]

go the o2 sensor form bosch, now i need to find the time to do it. i went to a mecanic an asqued for price to do the job and a got a wierd answer. that my beetle haz 3 O2 sensors. is that the truth?

[Smileybug]

there are 2 of them.

[mirciov]

thank you! i gues the didn't want to do it and wate tring to get rid of me

[mirciov]

got new o2 sensor today. the car is stil runing bad. new MAF, new O2,new ignition wires and spark plugs engine stil runing ruf. any ideas?

[Smileybug]

Have you scanned the car for codes? How is it running bad? No power? Rough idle? etc.

[mirciov]

no codes, rough idle, very loud, sometime loss of power before reaching the operatinc temperature.

[savethebluths.org]

I would still scan it.


I also wouldn't jump to the conclusion that its an o2 sensor, there are a few more frequently services parts before the o2 sensor.

Check your MAF, intake, coils and plugs, check for leaks etc.


If you're throwing a CEL for an o2 sensor then I would replace it but not before.

[Smileybug]

Scan the car. The car can throw codes that don't trigger a CEL.

bluths, they already replaced the o2 sensor, MAF, plugs and wires.

[mirciov]

i scan the car every night after i come home from work. no codes. will do the oil change this weekend. before changing the O2 i got a code saing no activity on O2 sensor-bank 1. the car has over 100k, it was time to change it, so i did.

[mirciov]

doesn't the computer need a couple of driving cicles to make the changes in the way it runs the engine?

[Smileybug]

Once you fix a problem, it should be fixed.

Might take some cycles to throw some codes after they've been cleared though.

Fuel filter been replaced?

[mirciov]

got P1128 code again. after all the new parts i put in.