For 1990-2009 cars

Condition | Causes
--- | ---
Low pressure due to the steering pump |

• | A seized or inoperative flow control valve

• | A worn pressure plate

• | A worn thrust plate

• | An improperly installed pressure plate

• | An improperly installed thrust plate

• | A cracked thrust plate

• | A cracked pressure plate

• | A broken thrust plate

• | A broken pressure plate

• | A worn cam ring

• | A worn rotor

• | Worn vanes

• | Vanes sticking in the rotor slots

• | High internal pump leakage