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Old 29-06-2010   #1
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Lambda sensor broken during exhaust system replacement

Hey all

I just had the exhaust system replaced on my Punto 1.2 (2000), and apparently the lambda sensor was damaged during the process.

My question is: Is it normal that a lambda sensor "dies" when you replace the exhaust system in a Punto?

I'm curious as my mechanic claims that it happens "all the time", yet he didn't check if the sensor was working on my car after he replaced the system.

I'll appreciate your opinions
Bests
-Haakon
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Old 29-06-2010   #2
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Re: Lambda sensor broken during exhaust system replacement

Quote Originally Posted by Haakondk View Post
Hey all

I just had the exhaust system replaced on my Punto 1.2 (2000), and apparently the lambda sensor was damaged during the process.

My question is: Is it normal that a lambda sensor "dies" when you replace the exhaust system in a Punto?

I'm curious as my mechanic claims that it happens "all the time", yet he didn't check if the sensor was working on my car after he replaced the system.

I'll appreciate your opinions
Bests
-Haakon
Sounds like he's trying to have you on. If done properly they don't get damaged when removed, hence why you can goto a scrappy and get one that works and pop it on your car. I'd kick his arse and say you broke you pay for it.
Thanks Haakondk thanked for this post
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Old 29-06-2010   #3
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Re: Lambda sensor broken during exhaust system replacement

Thanks - that was also what I thought, but nice to get the oppinion from someone else aswell.

So can we agree that the lambda sensor easily can get dammaged if not removed properly, but it should not happen to a pro? (The guy is an exhaust specialist)?

Thx again
-Haakon
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Old 29-06-2010   #4
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Re: Lambda sensor broken during exhaust system replacement

Quote Originally Posted by Haakondk View Post
Thanks - that was also what I thought, but nice to get the oppinion from someone else aswell.

So can we agree that the lambda sensor easily can get dammaged if not removed properly, but it should not happen to a pro? (The guy is an exhaust specialist)?

Thx again
-Haakon
He must of beaten the crap out of it, also how has he tested it saying its duff?
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Old 29-06-2010   #5
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Re: Lambda sensor broken during exhaust system replacement

Yeah he's probably broken it in some way! I have a spare lambda sensor. I'm in manchester
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Old 29-06-2010   #6
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Re: Lambda sensor broken during exhaust system replacement

Quote Originally Posted by simondhopkins View Post
He must of beaten the crap out of it, also how has he tested it saying its duff?
Or he forgot to unplug the Lambda lead, let the exhaust pipe drop and ripped the wire out of the sensor.
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Old 29-06-2010   #7
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Re: Lambda sensor broken during exhaust system replacement

Quote Originally Posted by Haakondk View Post
Hey all

I just had the exhaust system replaced on my Punto 1.2 (2000), and apparently the lambda sensor was damaged during the process.
Define "exhaust system"- rear box/centre section with flexi/manifold and cat assembly?

The lambda sensor is fitted into the manifold/cat and is nowhere near the rest of the system and shouldn't be touched at all, even if having to use heat to remove the front flexi fittings.
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Old 29-06-2010   #8
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Re: Lambda sensor broken during exhaust system replacement

Quote Originally Posted by D4nny8oy View Post
Define "exhaust system"- rear box/centre section with flexi/manifold and cat assembly?

The lambda sensor is fitted into the manifold/cat and is nowhere near the rest of the system and shouldn't be touched at all, even if having to use heat to remove the front flexi fittings.
Good point I forgot that.

KICK HIS ARSE!!!
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Old 30-06-2010   #9
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Re: Lambda sensor broken during exhaust system replacement

Quote Originally Posted by D4nny8oy View Post
Define "exhaust system"- rear box/centre section with flexi/manifold and cat assembly?

The lambda sensor is fitted into the manifold/cat and is nowhere near the rest of the system and shouldn't be touched at all, even if having to use heat to remove the front flexi fittings.
I had the cat replaced aswell, so I guess he needed to "touch" it. That not said that he needed to break it...
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Old 30-06-2010   #10
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Re: Lambda sensor broken during exhaust system replacement

Quote Originally Posted by Haakondk View Post
I had the cat replaced aswell, so I guess he needed to "touch" it. That not said that he needed to break it...
Why didn't you say that in the first place? Would've saved a lot of people assuming it was a simple centre/rear box replacement and getting their pitch-forks and flaming torches out.

Lambda's normally come out ok, though as with anything metal they can seize in place- and if so, it's not his fault if it shears. If he damaged the tip or the wiring on removal, then yes- he's at fault.
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Old 30-06-2010   #11
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Re: Lambda sensor broken during exhaust system replacement

Agree on that. Mine all look ok but stainless can self weld (galling) into place so it can be easy to damage a Lambda sensor when you take it out.
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Old 30-06-2010   #12
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Re: Lambda sensor broken during exhaust system replacement

Quote Originally Posted by D4nny8oy View Post
Lambda's normally come out ok, though as with anything metal they can seize in place- and if so, it's not his fault if it shears. If he damaged the tip or the wiring on removal, then yes- he's at fault.
If the sensor was seized in place and sheared because of that, I guess my mechanic would have notised that and replaced the sensor right away.
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Old 30-06-2010   #13
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Re: Lambda sensor broken during exhaust system replacement

I don't quite understand where you're coming from with this? Is the sensor broken off/sheared or not reading correctly?
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Old 30-06-2010   #14
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Re: Lambda sensor broken during exhaust system replacement

The sensor was not reading corectly and as a result I had the warning indicator light up as i left the work shop. I drove the car back, and after a few hour the mechanic calls me to informe me that the lambda sensor is not working, and that it is quite normal that lambda sensors get dammage when taken out.
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Old 30-06-2010   #15
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Re: Lambda sensor broken during exhaust system replacement

As he was repairing damage to the catalyst he should have warned you of the risks to the lambda sensor but now we know the full story he's actually right. They do get damaged. You will have to get a new one.
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