Oxygen sensor wiring

I am having my 1994 4.3 Blazer worked on and the mechanic tells me there is a short in the wiring to my oxygen sensor. He said it could cost over 750 dollars to fix it since the wiring goes around the transmission and he might have to pull it out to find the short. Is there a way to just run a new wire to the sensor. Any advice would help.

Thanks

if there is a wiring problem in that harness you dont have to pull the tranny. unplug all the harness connectors and clips and remove the harness. sounds like they were trying to scam u. you can do it yourself but your going to need a detailed wiring diagram. quite honestly they might have b.s. about the o2 sensor wiring to begin with. is the o2 sensor a 1 wire or a 4 wire heated sensor? do you have a scantool that can read live data?

Wow, what a crooked mechanic.

Report him to the better business bureau.

$750 for a O2 sensor replacement? Jesus, you can do it yourself for $5 once you find out what wire is shorted.

im glad i wasnt the only one who thought that was shady!

No shit, that is why no one can trust mechanics anymore, they are all out to fuck you over.

This is why everyone is learning more online like here.

Someone should start a web page for reporting scam mechanics, and list the few good ones.

I had to quit working for 1 shop several years ago when the boss asked me to really screw over some woman getting an out of province inspection. They wanted $800. to fix a perfectly good, and safe Jeep.

I'm glad that they got shut down 4 years later

not all mechanics are that way. i am a legitimate mechanic.

Thanks for the input. I thought the same thing so I basically told him to get @#. I figure I can look for the short myself and I don't find one replace the sensor. I might replace the sensor anyway since the car has almost 100,000 miles.

Again, I appreciate your thoughts.

odb...

Some circles of thought are that the O2 sensor should be replaced every 80K to 100K miles. They do lose their efficiency.

Oh bigtime, I just replaced both of mine and fuel economy is up 3MPG.

I agree with you Busa 4 I can't do all my repairs now due to a very active past lifestyle, that leaves me in a lot of pain most of the time, So I found a great old school mechanic for 40.00 bux hour canadian. He only takes in the jobs that he wants, but he'll never rip you off. He'll tell you what's wrong with your car even if he won't take the job, so you shouldn't get ripped off.

Those are the good ones.

An informed consumer is the best defense against fraud and unscrupulous service.
I find it disconcerting, the generalities used here against mechanics.
Statements such as:
"No shit, that is why no one can trust mechanics anymore, they are all out to fuck you over."

Well, some of us here are mechanics who work everyday and see all kinds of problems. Some are retired. And these mechanics offer a wealth of knowledge and experience. However, we offer advice based upon those experiences in the thought of helping others out with out the expectations of any renumeration just the feeling of helping others with what we know.

This is only my opinion.

I do admit, I was wrong with that statement.

But with labor rates the way they are and climbing, no one will be able to afford to have anyone but themselves have their vehicle repaired past the warrenty.

As a retired GM Master Tech and ASE Master rating I have to say I have always gone out of my way to help anyone at any time. Hell I had to miss the Steeler football yesterday because a friend needed help.
As per the shop rate the Tech gets very little of that very high labor rate. And being flate rate you have to be very good and fast at what you do.
And if you get any come backs we did NOT get paid to fix it a sec time. Guys used to kid me about taking home a shop manual and look it over on the weekends but it sure help out when you need to know something and did not have to waist the time to go and look it up.
Fireplug
When we would take the yearly GM rating tests we lived in the dam manuals looking for the answers to tests.
So if you go to a dealership insist on a Master Tech because he will not just throw parts at the problem He will test things first and then know what the problem is before he installs new parts.

I get a Master Tech for US$50/hr here so your arguement just went out the door.

The guy was rippping him off plain as day and arguing against that means you are supporting and thinking this con act is legit.

Not cool and you know that that kind of money for a broken wire is a complete criminal act.

Who are you talking to ????

Anyone that condones or think this was a fair act and that ridiculous charge was warrented for a O2 sensor wire check.

Yo m8 I never said anything like that .Did you take your Prozak today?? I just told you the way it works at a large Dealer NOT at some fly by night parts changer shop.
I would never stand for anything like that and if I would have seen anything like that at our Dealership I would have said something to the owner and the the service write up guy.
My point(that you missed) was WE the Techs dont get that full labor rate that you see posted we get a fraction of it.
So before you go off have cocked have you facts in hand.
This is the second time you have gone off on me for no reason but you have the gall to pick on some other guy for asking as question.
We are all here to help each other NOT TO SEE WHO CAN Piss each other off the most.
So lets start off fresh
Hello my nic is Fireplug its nice to meet you.

Fireplug

I never said it was you this was against, just anyone that condones it.

Sorry m8 it sure sounded like it to me.

No problem.

Hey Fireplug, don't forget that your always looking through magazines, and forums, since so many people have had problems not covered in manuals, and they're always willing to tell you how they solved the problem.

My mechanic recently had a brake problem that he's never seen, and he resolved it using 1 of my 15 year old magazines. (He's got 30 years experence)

Overboardproject
Good point I have used that on more then 1 time.
When we got sent to GM tech school ( about 3-5 times a year) we all wanted to talk to all the other techs in the class just to talk shop about problem cars they have had and what the fix was. That was the best training anyone could get.
Fireplug

Thanks everyone for your input. I told the guy to leave it alone and I would fix it when I could afford to. I took my blazer to another mechanic that I have heard good things about. I told him what the first guy said and he thought that was wrong, so he looked it over and determined the O2 sensor itself was going bad, replaced it and double checked the wiring just to be sure. The wiring had no problem what so ever, it was just the sensor. He charged me $65 for the sensor and $55 for the labor he did. $120 versus $750+!!! I am going back to the first shop soon and raising some hell about the situation.

Again thanks for all the input.

odb...

So it works fine now?