Dash Warning Light

[Jeff J]

Hi
I have another warning light come up on the dash, the engine symbol outlined in yellow, deteriated emissions, it drives as usual, no loss of power, I'm suspecting oxy sensor or failed catalyst,hence the need for a code reader, any ideas would be very welcome
Thanks

[CarsOrBikes]

More likely the sensor than the cat I would think, maybe the sensor before the cat

[Jeff J]

Thanks, for your reply,I would also have gone for the sensor first, do you know if these minis are fitted with an EGR Valve, if so another possible cause.