my 94 civic threw four codes

1 - O2A - Oxygen sensor #1
6 - ECT - water temperature sensor
16 - Fuel injectors
17 - VSS - speed sensor

should i change my o2 sensor? my water temperature in the cluster died so could that be the reason for code 6? and should i just clean my fuel injectors to see if it solves code 16? my speedometer also isnt working. i tried cleaning up the plugs but it still doesnt work. so should i just change my speed sensor?

 

anybody?

 

Run some injector cleaner through it, pouring it into a tank of 50/50 premium and regular fuel..this might take care of your injector code and possibly the 02 code..If not replace the O2 sensor and thouroughly inspect the injectors (o-rings and plug connections) and replace if nessecary.As far as the other two codes your probably best just to replace the sensors. Good luck