Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Code 13 - High Line Pressure (1992): Description
The PCM modulates line pressure by grounding line pressure actuator. As duty cycle decreases (circuit is more open), line pressure increases. As duty cycle is increased (circuit is grounded more), line pressure decreases. When PCM lowers line pressure, this causes gear shifts to take more time. A code 13 will be set if transaxle oil temperature is above 104°F (40°C) and PCM detects that shifts occur too fast even though line pressure has been commanded low.
- If present, go to information flag listed. Using flow charts, check for possible causes of trouble code.
- See ACTUATOR QUICK CHECK under SELF-DIAGNOSTICS.
- See HYDRAULIC PRESSURE TESTS in AUTO TRANS OVERHAUL - SATURN article.
- If line pressure does not change or only changes a little, regulator valve is stuck. If necessary, see HYDRAULIC PRESSURE TESTS in AUTO TRANS OVERHAUL - SATURN article.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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