on March 1, 2016, 11:52 am, in reply to "Volvo V70 - blowing smoke back from round turbo"
I would have said the pressure reading should rise when blocking the tail pipe.(bearing in mind it is a differential sensor not a pressure sensor)
Seen one off these with the pipes to sensor totally blocked.
Try a manual gauge at front sensor output or maybe try disconnecting DPF from front pipe.
I would concentrate on addressing the back pressure first, Then look for DPF codes second..
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Volvo V70 2.0 D4204T 2010 - Blowing smoke back from round turbo # - Gerald Oliver February 29, 2016, 9:28 pm
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