I'm having a lot of problems with my speedometer. It won't register at any speeds. I've tried taking it out of the engine, and I've pulled to gauge cluster out. No matter what I try, it still doesn't work. My friends '94 Civic is having the same problem. I don't know if the two of us are just unlucky, or if this is a generally widespread speedometer problem. I would appreciate it if someone could help me.

 

Problem: The speedo doesn't work but the odometer works.
Solution: Replace the cluster or replace the speedo gauge

Problem: The speedo doesn't work AND the odometer doesn't work.
Solution: Replace the speedo sensor in the transmission.

Problem: Neither solutino above fixed it.
Solution: Check all wiring from the sensor to the gauge. Because the signal is disrupted somewhere.

 

When the sensor is bad you may also get a check engine light.

First thing to check is that the plug on the sensor is secure because that doesn't cost anything to fix.