What can I do about a ECU code 12? on 1990 Honda CRX

The check engine light on my 89 CRX recently started coming on, usually after I've been driving it for awhile. When I got the chance I checked what the code was and it was 12. After doing some looking I found out that its the EGR Lift Sensor, but I don't know what that means for my car. How will that affect my car and how can it be fixed?

Asked by for the 1990 Honda CRX
some fault codes stored in your ECU,
you should to clear the DTC.