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EP3 Lambda sensor error after fitting cat back exhaust?

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4
So I fitted a Fujitsubo Legalis R cat back exhaust to my EP3 and straight away engine light came on with 65-02 HO2S S2 heater (P0 Circuit 141) malfunction - which is the 2nd lambda sensor?

Running stock manifold and cat just changed B pipe and rear silencer, surely that should not affect anything?

What’s the best way to sort this out? Could the sensor get damaged somehow after a tough fight with the exhaust bolts?

Any help would me muchly appreciated as I need to get this sorted but not sure where to start.

Thanks!
 
Check the connector on the lambda loom, it may have come apart a little?

Otherwise it maybe you've touched/disturbed sensor and it's now gone faulty, you could remove it and test it, if you know how to use a multi-meter & a heat source , see the attached YouTube video...

https://www.youtube.com/watch?v=NKsS6AELPuM
 
Thank you very much for that! Indeed it turned out that the sensor was faulty, it must have been disturbed when trying to take the exhaust off. Got a new one fitted reset ECU and happy days.

Cheers! :)
 
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