Check fluid level. if needed, add fluid. Alot of folks think it's "snake oil" but I use "No Leak" for amber leaks ps fluid successfully in all my vehicles. Recently my daughter's car lost a ps hose & I replaced it. After replacement of 1 hose, I found a leak in another. Made a roadside repair w/hose clamp & piece of rubber to get home, but the pump was making alot of noise. I added more fluid, noise didn't stop. Parked car, let sit about 2 months. Bought new car for daughter. I went to move her old car last week, battery was dead. Opened hood to jump start & checked ps fluid level. A little low, so I added some & started car. No noise & works great, too! Maybe the air escaped on its own? I don't know, but took 30 mi. drive to check, no fluid loss. Thank You, LRW.