Traction control light randomly comes on

[atkin82]

Anybody know what causes traction control light randomly coming on its every few days? I be driving the light would come on and it puts the brakes on and comes to a stop. Sometimes difficult to start engine. It's astravan 1.7 cdti 2012

[Nefos]

If I need to make a wild guess then it is going to be a failed wheel speed sensor, suddenly it reads too high/too low speed and the ECU freaks out.
Just take it to a garage, should be a simple and cheap job, and they can diagnose it much better than forum people

[MB140]

It’s normally the reluctor ring on the driveshaft corroding (part of the wheel speed sensors.

BMW are common for it and a main dealer will try and sell you a whole driveshaft (not sure on other manufactured) you can buy the rings separately at much reduced cost.

[SturdyHSV]

If the light comes on and the car then comes to a stop and is difficult to start (not entirely clear if that is a sequence of events or just random additional info you've given) then could I offer the possibility that it isn't the traction control light that's coming on but an engine warning light of some sort?

But yes as above typically likely to be a wheel speed sensor failing and giving dodgy readings, or one of the toothed reluctor rings that the wheel speed sensors read is badly corroded enough that it doesn't read very well...