A failing underground line does not always mean trenching across the yard. When the pipe is cracked, root-damaged, or offset but the surrounding ground is stable, a liner or a burst-replacement line can go in through two small access pits instead of an open trench.
There is no safe do-it-yourself step here since the pipe is underground. The useful thing to do is have the line cameraed first to see whether it is a candidate for a trenchless fix versus open excavation. If the yard is pooling water or sewage is surfacing, stop and call rather than waiting.
Whether trenchless repair fits Chula Vista, CA soil conditions and the pipe's condition is something the plumber we connect you with can assess on site. Call (844) 898-0295 to get connected.