More than likely imbalance across the axle.Any more than 20% flags the light.
But if you got a rehostat down on the caliper this this will flag the light.
You can buy the caliper sensor for about 9 quid and the cable for 7.
You do need the reader to set the sensor to zero but you can borrow one if you know somebody in the know.
Does not look like the pads are buggerd to me.
Just some main agent screwing your ■■■.