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Discussion Starter #1
Issue with fuel additive tank, internal peizo sensor broken in tank .
This will put the car into Mil ( limp mode )
You have 3 options replace tank , remove tank cut open and replace peizo sensor or Get it written out of the ECU .
Getting the tank out involves removing rear axial .
If it the pump that is broken you can get to it without removing tank just prise off the white plastic end and the pump is just in there on a 2 pin connector just pull it out its just held in with a O-ring it's a reciprocating pump that get a PW on / off supply of 12v to make it shuttle back in forth.

I have just cut open the tank tonight cut round between the whit and black bit with craft knive and your in .
I am currently sorcing a peizo 3 wire sensor .
 
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