All,

do you think a fuel pump on it's way out could cause an emissions related MIL code?
The light illumination is also just after a vpower refuel
It's the PO420 Catalyst system efficiency below threshold which has reset ok.
As you start to listen a bit harder when your car has issues... The fuel pump drone seemed to be a little 'pitchy' and 'whistly' (LOL)

any ideas??? May stick a walbro in just to be safe...

(2002 STi btw bog standard Inc original exhaust)