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Engine-Codes – Generic – P0747

P0747 Code - Pressure Control Solenoid 'A' Stuck On

Quick Answer

The OBD-II trouble code P0747 indicates that the Pressure Control Solenoid 'A' is stuck in the on position. Common causes include Faulty pressure control solenoid 'A', Wiring or connector issues, Low transmission fluid level or dirty fluid. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P0747 indicates Pressure Control Solenoid 'A' Stuck On.
Common causes
Common causes include Faulty pressure control solenoid 'A', Wiring or connector issues, Low transmission fluid level or dirty fluid.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 07, 2024
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Code P0747 Description

The OBD-II trouble code P0747 indicates that the Pressure Control Solenoid 'A' is stuck in the on position. This solenoid is responsible for regulating the hydraulic pressure in the transmission, which is crucial for proper gear shifting and overall transmission operation. When the solenoid gets stuck in the on position, it can lead to issues such as harsh shifting, delayed or erratic gear changes, transmission overheating, and even transmission failure if left unaddressed.

OBDII Code P0747 - Pressure Control Solenoid 'A' Stuck On
P0747 Code - Pressure Control Solenoid 'A' Stuck On

Common Causes of P0747

  1. Faulty pressure control solenoid 'A'
  2. Wiring or connector issues
  3. Low transmission fluid level or dirty fluid
  4. Internal transmission problems
  5. Electronic control module (ECM) malfunction

Symptoms of P0747

  1. Harsh or delayed shifting
  2. Erratic gear changes
  3. Transmission overheating
  4. Illuminated Check Engine Light
  5. Transmission slipping or jerking

How to Fix P0747

  1. Diagnose the issue: Use a scan tool to retrieve the trouble code and check the transmission fluid level and condition.
  2. Inspect wiring and connectors: Check for any damage or corrosion in the wiring harness connected to the pressure control solenoid 'A'.
  3. Replace pressure control solenoid 'A': If the solenoid is determined to be faulty, it will need to be replaced with a new one.
  4. Flush and refill transmission fluid: If the fluid is dirty or low, perform a transmission fluid flush and refill to ensure proper operation.
  5. Clear codes and test drive: After completing the repair, clear the trouble code from the vehicle's computer and test drive to ensure the issue has been resolved.

Cost to Fix P0747

The cost of repairing a Pressure Control Solenoid 'A' Stuck On issue can vary depending on the make and model of the vehicle, as well as the labor rates in your area. On average, the cost of replacing the pressure control solenoid 'A' can range from $200 to $500, including parts and labor. However, additional costs may apply if other components need to be replaced or if there are underlying transmission problems that need attention. It's recommended to get a few quotes from different auto repair shops to find the best price for your specific situation.

What does this mean?

Tech Notes for P0747

When a transmission solenoid has malfunctioned, in most cases the problem is not the electrical part of the solenoid; the problem is foreign material obstructing the mechanical function of the solenoid or the flow of the fluid through the transmission valve body. If the transmission fluid is dirty, it's recommended to change the transmission fluid and if possible, remove the transmission pan for further diagnosis. Excessive debris or metal particles on the transmission pan could be an indication that there is a mechanical transmission failure, and that the transmission will need to be rebuilt or replaced.









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When is the Code Detected?

The gear required by the Engine Control Module (ECM) does not match the actual gear when driving

Need more information about the P0747 code?

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Code P0747 Information for Specific Makes

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0747 Code

1. What are the common symptoms of OBDII code P0747 (Pressure Control Solenoid 'A' Stuck On)?

- Common symptoms include harsh shifting, transmission slippage, decreased fuel efficiency, and illuminated Check Engine Light.

2. What can cause the Pressure Control Solenoid 'A' to get stuck on and trigger code P0747?

- The main causes can be a faulty pressure control solenoid, low transmission fluid level, a clogged transmission filter, or internal transmission issues.

3. How serious is the OBDII code P0747 (Pressure Control Solenoid 'A' Stuck On)?

- Ignoring this code can lead to further damage to the transmission and potentially result in costly repairs if left unresolved.

4. Can I drive my vehicle with OBDII code P0747 (Pressure Control Solenoid 'A' Stuck On)?

- It is not recommended to drive the vehicle with this code present, as it can cause further damage to the transmission and affect the vehicle's drivability.

5. How do I diagnose and repair OBDII code P0747 (Pressure Control Solenoid 'A' Stuck On)?

- Diagnosis typically involves checking the transmission fluid level, inspecting the wiring and connectors to the solenoid, and testing the solenoid itself. Repair may involve replacing the faulty solenoid or addressing any underlying transmission issues.

6. Can a DIY enthusiast fix OBDII code P0747 (Pressure Control Solenoid 'A' Stuck On)?

- While diagnosing the issue may be possible for some DIY enthusiasts, repairing the problem often requires specialized tools and expertise, making it a job best left to professional mechanics.

7. How much does it cost to repair OBDII code P0747 (Pressure Control Solenoid 'A' Stuck On)?

- The cost of repairing this code can vary depending on the underlying issue, but it typically ranges from $200 to $600, including parts and labor.

8. Will resetting the Check Engine Light resolve OBDII code P0747 (Pressure Control Solenoid 'A' Stuck On)?

- Resetting the Check Engine Light may temporarily turn off the warning indicator, but the underlying issue causing the code will still need to be diagnosed and repaired to prevent further damage.

9. Can a transmission flush help resolve OBDII code P0747 (Pressure Control Solenoid 'A' Stuck On)?

- In some cases, a transmission flush may help if the issue is related to dirty or contaminated transmission fluid. However, it is not a guaranteed fix for a stuck pressure control solenoid.

10. How can I prevent OBDII code P0747 (Pressure Control Solenoid 'A' Stuck On) from occurring?

- Regular maintenance, such as checking and changing the transmission fluid at recommended intervals, can help prevent issues like a stuck pressure control solenoid and the associated OBDII code.

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