Reving high

[Drew1]

Hi can anyone help me, when I first start my car it revs high for about 2 seconds then goes back to normal, but it’s only happened a couple off times on various occasions any ideas any one ?

 

[Drew1]

Anyone

 

[Madman0405]

Sorry haven't come across this! At a guess could be one of the sensors going wrong.
Good luck

 

[Drew1]

What sensors could this be by any chance.