i need help sense i changed all of the brake pads on my 92 lude, i was driving and all of a sudden the D4 light started to flash on and off and the CEL (check engine lite) came on, and when the D4 light flashes the spedometer doesnt work. when u turn the car off and back on it will work again and the light will stop flashing and CEL will go off.... but the car runs fine and the brakes are excelent. if anyone could help it would be great. thanks.

 

i don think it has to do with ur brakes
my bros acura legend does the same thing
it was a bad sensor in the auto gearbox
have a shop look at it

 

thanks

 

Check the "Speed Sensor"