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Lambda sensors ST170

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Old May 31, 2013 | 10:56 AM
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From: Devon
Default Lambda sensors ST170

HI all my friend has an ST170 with the usual lambda sensor issues. He has the new sensors ready to install.
My question is, are these particularly difficult to change? They don’t look their in the easiest positions to change them. Just wondering if anyone has any advice before I start.
Thanks, Gareth.
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Old May 31, 2013 | 11:08 AM
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they are pretty easy. I had a decat pipe on my old st and the location on it made it difficult. All i used was a ring spanner
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Old May 31, 2013 | 11:10 AM
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New sensors? More than 1?
A Oxygen sensor can be defective, but all of them at the same time? Not likely.

What are the fault codes (including numbers if known)?
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Old May 31, 2013 | 12:07 PM
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I cant recall the codes.

I understand it was diagnosed as the pre cat sensor, but to be safe he’s re-newing them both. Theres no harm in changing them both, especially seeing how prone they are to failing on this model.

Thanks for the advice though, Gareth
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Old May 31, 2013 | 05:53 PM
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Originally Posted by oldford
New sensors? More than 1?
A Oxygen sensor can be defective, but all of them at the same time? Not likely.

What are the fault codes (including numbers if known)?

it is highly likely with the st170, as they are notorious for failing / eating lambdas
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Old May 31, 2013 | 05:58 PM
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Did you check the readings as a blocked filter, dodgy air mass, or even an after market filter can cause it to run rich/lean causing the lambda to throw up a code
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Old May 31, 2013 | 06:08 PM
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Originally Posted by Mike@8BallTuning
it is highly likely with the st170, as they are notorious for failing / eating lambdas
If you want to spend money changing parts that are perfectly in order, be my guest.
Especially if you buy the parts from me.
I personally would donate the money to lets say the Internatial Red Cross.
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Old Jun 1, 2013 | 10:16 AM
  #8  
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Thanks all.

As I said above perftly acceptable to change both sensors and if he's happy to buy them both, which he has then it makes sense to do them both now.


Gareth.
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