2011 S40 T5 - really poor MPG

[RaulGuichard]

Greetings,

Just bought a used 2011 S40 T5. It had some trouble with the boost sensor (code P0236) but have already replaced it. However I'm getting really poor MPG (12.5) and it isn't performing as I expected, so I'm about to do an ECU reset, just worried about the radio entering into anti-theft mode since I don't have it's code to unlock it. Does anybody know if the radio would enter in anti-theft mode even if I reconnect the cables with the key in position II or if I do it like that I shouldn't worry about locking the radio?

Thanks in advance