Service Ride Control (96 Sedan DeVille)
 

The src comes on most of the time automatically and then sometimes after 1/2 mile or so. The ride is very stiff. No codes other than RS0030, thats the only one pulled then I clear it. The next time I start her up, there it is again. Is there a censor I can check or replace or something to remedy the problem. I do most of all my own work.