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Discussion Starter #1
the pre cat o2 sensor is unplugged on my car for some reason, anyone know where it should be plugged in, in the loom? Had a look but nothing stands out. car is 54reg 2.0 136bhp sw. Thanks
 

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No O2 sensor on HDI must be temp or pressure sensor for DPF and disconnected as DPF removed or mapped out
 

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Has it had an aftermarket exhaust at some time?

I've known instances where exhaust fitters have put on the wrong one and there's been no hole for a sensor, so they've left it hanging!
 

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Discussion Starter #4
thanks for the replies. Its still the original exhaust. The sensor is in the pipe between cat and turbo. Was told at Peugeot it was o2/lambda sensor. the sensor is screwed in the pipe but the end that plugs in the loom is unplugged. I have photos....
 

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