For 1990-2009 cars

#### High or Low Oil Pressure

Checks | Cause
--- | ---
Oil Level | High or low; correct as required
Vacuum Line | Leaking, pinched, disconnected, or cut
Modulator | Leaks or damaged diaphragm (A bent modulator will not function correctly)
Modulator Valve | Nicked, scored, or cut valve
Oil Pump Assembly |

• | Slide stuck, seals damaged, vanes damaged

• | Pump drive shaft damaged

Pressure Regulator Valve or Springs | Nicked or scored valve; damaged springs
Pressure Relief Valve | Damaged spring; missing ball