For 1990-2009 cars

Problem | Action
--- | ---
Low fluid | Add fluid.
The TV cable out of adjustment, binding or damaged | Adjust or replace the throttle valve cable.
The shift select cable out of adjustment, binding or damaged | Adjust or replace the shift select cable.
The manual valve binding or is sticking | Inspect the valve body.
The throttle valve binding or is sticking | Inspect the valve body.
The B2 control valve binding or sticking | Inspect the valve body.
The accumulator(s) pistons damaged or leaking | Inspect the accumulator pistons.
Accumulator(s) seals cut or damaged | Inspect the accumulator seals.
Accumulator(s) broken or distorted springs | Inspect the accumulator springs.
Incorrect line pressure | Perform the line pressure diagnosis.