OBD-II Generic Error Code P0747: How to Fix It

Medium 2-4 hours Medium Severity Verified June 2026
Error Code
P0747
Brand
OBD-II Generic
Product Type
automotive
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
2-4 hours
Error code P0747 means the transmission control module has detected that pressure control solenoid A is stuck in the 'on' position. This disrupts hydraulic pressure regulation, often causing harsh shifting, slipping, or transmission overheating.
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Tools You'll Need

How to Fix Error Code P0747

  1. Check Transmission Fluid Level and Condition

    Use caution when checking hot transmission fluid to avoid burns.
  2. Inspect Wiring and Connectors

    Disconnect the battery before working on electrical connections.
  3. Test Solenoid Resistance

  4. Perform a Pressure Test

  5. Replace Pressure Control Solenoid A

    Use jack stands if lifting the vehicle. Dispose of old fluid properly.
  6. Clear Codes and Test Drive

Parts You May Need

Pressure Control Solenoid A
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Transmission fluid
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Transmission pan gasket
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Pressure Control Solenoid A
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Transmission fluid
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Transmission pan gasket
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Pressure Control Solenoid A
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Transmission fluid
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Transmission pan gasket
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Pressure Control Solenoid A
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Transmission fluid
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Transmission pan gasket
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When to Call a Professional

If you have limited mechanical experience, or if replacing the solenoid does not resolve the issue, seek a professional transmission shop. Internal transmission damage (e.g., clogged valve body, worn clutches) requires specialized tools and expertise.

Frequently Asked Questions

Can I drive with error code P0747?
Driving short distances is possible, but continued driving may cause transmission damage due to harsh shifting, slipping, or overheating. It's best to repair promptly.
How much does it cost to fix P0747?
DIY repair costs range from $50–$200 for the solenoid and fluid. Professional repair typically costs $300–$800 including labor.
Is P0747 the same for all vehicles?
Yes, P0747 is a generic OBD-II code with the same definition across all makes, though solenoid location and repair procedures vary by vehicle.
Can low transmission fluid cause P0747?
Yes, low or dirty fluid can affect solenoid operation and trigger the code. Always check fluid condition first.
Do I need to replace the entire solenoid pack?
No, you can replace just solenoid A if tests confirm it's faulty. However, replacing the entire pack may be recommended for higher mileage vehicles.