traction control light, comes on after 10 minutes of driving loose rev counter and power,had it checked by my local mechanic, on his meter reading it,

[Paul warwick]

traction control light came on after around 5 minutes, took it to my local garage and had the plug in sensor reader, it said crank shaft sensor, so had it changed, but still did the same problem, the fiesta st is a 180, 2017 with upgrades, and a viper alarm, could it be the alarm?

 

[Breandawg]

Check to see if any pipes relating to the turbo have blown off the larger the intake pipe, they relate to the turbo and affect all sorts of parameters including the rev counter dying, low power, etc.