A bit of a brain teaser this one. Its come in with the engine light on with code P0414 - secondary air injection system switch valve A circuit. I'm having a lot of trouble reliably reading this car so I'm a bit dubious of the descriptions accuracy. I don't think the car is fitted with a secondary air injection system at all!

I've done some research on this without much sucess other than someone mentioning that this problem was caused by the wiring loom behind the front bumper getting damaged confusing the ECU. I know the X types have a lot of loom issues but does this apply to the S types as well?