Service light turning on

[Teenahshe]

What might be the problem.with my car whenever I reach 45+ mph my service light blinks it's now a week and it happening after taking the car for service.

[GiveMeABreak]

May be related to the emissions, but has you haven't provided any information about what vehicle this is (you have a Ford Focus in your Profile), you've not given us anything to go on.

Vehicle, Engine code, year, mileage, diagnostic codes......? Or just provide the VIN and the mileage. Please post your VIN in full without spaces - it will be automatically masked from public view after submitting your post & will only be visible to staff.

[Gibbo2286]

My C5 used to flash the service light when the screenwash needed topping up.