For 1990-2009 cars

Check | Causes
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DEFINITION: Transmission main line pressure that is determined to be high or low. Refer to Line Pressure Check .
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

• | Pump slide seal out of location

• | 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

Fluid Filter |

• | Intake pipe restricted ·

• | Cracks in fluid filter

• | Fluid filter seal missing, cut or damaged

Control Valve Body Accumulator Assembly |

• | Manual valve scored or damaged

• | Spacer plate or gaskets misassemble or damaged

• | Control valve top channel plate not flat

• | Control valve bottom channel plate not flat

• | Feed limit valve or spring stuck in the exhaust position

Pressure Control Solenoid Assembly |

• | Contaminated

• | O-rings cut or damaged

• | Electrical connection

System Voltage |

• | 12 Volts not supplied to transmission

• | Electrical short - pinched solenoid wire

• | Solenoid not grounded

Clutch Accumulator | Leaking
Inspect for active transmission DTCs | Transmission DTC default action active