For 1990-2009 cars

Checks | Causes
--- | ---
Fluid Pump Assembly |

• | Pressure regulator valve stuck

• | Pressure regulator valve spring

• | Line boost valve spring

• | Line boost valve or bushing stuck, damaged or incorrectly assembled

• | Pressure relief ball not seated or damaged

• | Pressure relief ball spring

• | Fluid pump screen assembly plugged or damaged

• | Fluid pump rotor guide omitted or misassembled

• | Fluid pump rotor cracked or broken

• | Porosity in fluid pump

• | Fluid pump surfaces not flat

• | Excessive fluid pump rotor clearance

Pressure Control Solenoid Assembly |

• | Contaminated

• | O-Rings cut or damaged

• | Electrical connection

Inspect for active transmission DTCs | Transmission DTC default action active