My yell0w light f0r warning me t0 shift gear st0p w0rking!!

Yes, after my visit t0 the garage, t0 fix my leaking h0se, I n0ticed that my idle running 0f the car is set higher, just 0n the t0p little white mark ab0ve the l0west p0int 0n the speed0,

And the Yell0w indicat0r 0n the MPG gauge has st0p w0rking, which I think indicates y0u t0 change gear! can this be rescued???

It was nice t0 see everything w0rking at 0ne p0int but n0w, my little light d0nt w0rk n0w :cry: help

N0rm