For 1990-2009 cars

#### Incorrect Line Pressure

Checks | Cause
--- | ---
DEFINITION: Transmission main line pressure that is determined to be high or low. Refer to Line Pressure Check .
Automatic transmission fluid level (low pressure only) | Low fluid level
Thermo element assembly (low pressure only) |

• | The thermo element plate pins (120, 123) are misadjusted

• | The thermo element (121) or the thermo element plate (122) is out of position, missing, or damaged -- causing low fluid level in the oil pan

Oil filter and seal assembly |

• | The oil filter assembly (100) is missing or damaged

• | The oil filter seal assembly (101) is missing or damaged (low pressure only)

Wiring harness assembly | The wiring harness assembly (224) is disconnected or damaged
Oil pump assembly |

• | The following components are worn or damaged (low pressure only):

- | the oil pump cover (201)

- | the oil pump body (202)

- | the oil pump vane ring (209)

- | the oil pump rotor (210)

- | the oil pump vanes (211)

- | the oil pump slide oil seal ring (212)

- | the oil pump slide O-ring seal (213)

- | the oil pump slide (214)

• | The oil pump slide (214) is binding (high pressure only)

• | The oil pump prime springs (222, 223) or the oil pump slide pivot pin (215) is missing or damaged (low pressure only)

• | The oil pump slide seal (220) or the oil pump slide seal support (221) is missing or damaged (high pressure only)

Pressure control solenoid valve assembly |

• | The pressure control solenoid valve assembly (322) is damaged

• | The solenoid valve O-ring seals (305, 316) are missing or damaged

• | The valve retainer (314) is missing or damaged

Torque signal regulator valve assembly |

• | The torque signal regulator valve (321) is binding or damaged

• | The valve retainer (314) is missing or damaged

Pressure regulator valve assembly |

• | The pressure regulator valve (313) is binding or is damaged

• | The pressure regulator valve springs (311, 312) is missing or damaged

• | The reverse boost valve (310) is binding or is damaged (high pressure only)

• | The line boost valve (304) is binding or is damaged (high pressure only)

• | The valve retainer (302) is missing or is damaged

Actuator feed limit valve assembly (low pressure only) |

• | The actuator feed limit valve (414) is binding or is damaged

• | The actuator feed limit valve spring (415) is missing or is damaged

• | The actuator feed limit valve spring retainer (416) is missing or damaged

Low blow off valve assembly (low pressure only) |

• | The low blow off valve spring (323) is missing or is damaged

• | The low blow off ball valve (324) is missing, binding, or is damaged

• | The low blow off valve spring retainer (325) is missing or is damaged