i have a 2000 gsr, and my speedometer is broken(becuase of midas)....anyone know the cause of this and how much it would be to fix it?

the engine check light is on and i went to midas to do a scan and they said it was the o2 sensor in my cat

they messed up my car....it was owrking fine before i went to go get my exhaust installed. and they overcharged me

my odometer, and tach works fine, as does everything else...just the speedometer that is messed up.

It is most likely your vss (vehical speed sensor) It is located on the top of your tranny near the firewall, double check that is it plugged in.