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Discussion Starter #1 (Edited)
I have a pre-LP 2004 Gallardo in the UK. Does anyone know what the Fuel Evaporative pressure sensor does. I found recently that the red wire has been disconnected from the sensor and just the green and black wires are connected. This sensor is mounted on a bracket next to the right hand fuel tank . I need to know what this sensor does and is it necessary. Part number is. 400906206
 

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The evap sensor on my car is throwing an error and I have to replace it. Not sure exactly what it does but it has something to do with emissions. Im guessing perhaps someone might have disconnected the wires on yours due to it being faulty?

I ordered mine more than 6 months ago from Lamborghini and Im still waiting on it. It appears to be a difficult part to get, due to changes in emissions regulations.

Are you getting any error codes?
 

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No I have no error codes - the red wire has been disconnected. The green and black wires are still connected.
 
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