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

Quick Answer

The P0747 diagnostic trouble code for Audi indicates that the Pressure Control Solenoid 'A' is stuck on. Common causes include Malfunctioning pressure control solenoid, Wiring or connector issues, Faulty transmission control module. 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 Audi indicates Pressure Control Solenoid 'A' Stuck On.
Common causes
Common causes include Malfunctioning pressure control solenoid, Wiring or connector issues, Faulty transmission control module.
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 Audi Description

The P0747 diagnostic trouble code for Audi indicates that the Pressure Control Solenoid 'A' is stuck on. This solenoid is responsible for regulating the hydraulic pressure in the transmission, which is crucial for shifting gears smoothly. When this solenoid gets stuck in the on position, it can lead to various issues with the transmission's operation.

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

Common Causes of P0747 Audi

  1. Malfunctioning pressure control solenoid
  2. Wiring or connector issues
  3. Faulty transmission control module
  4. Accumulation of debris or sludge in transmission fluid
  5. Mechanical failures in the transmission system

Symptoms of P0747 Audi

  1. Harsh or delayed shifting
  2. Erratic transmission behavior
  3. Decreased fuel efficiency
  4. Illuminated Check Engine Light
  5. Transmission slipping

How to Fix P0747 Audi

  1. Begin by diagnosing the exact cause of the issue using a diagnostic scanner to confirm the P0747 code and inspecting the pressure control solenoid 'A'.
  2. Replace the faulty pressure control solenoid if it is found to be the root cause of the problem.
  3. Check for any wiring or connector issues and repair or replace them as needed.
  4. Flush the transmission fluid and filter to remove any debris or sludge that may be affecting the solenoid's operation.
  5. Test drive the vehicle to ensure that the transmission is shifting smoothly and the issue has been resolved.

Cost to Fix P0747 Audi

The typical repair costs for addressing a P0747 code in an Audi can range from $200 to $500, including parts and labor. However, it's essential to note that the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It's advisable to get quotes from local shops for a more accurate estimate.

What does this mean?

Tech Notes for P0747 Audi

When a transmission solenoid is 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 removing 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.

When is the Code Detected?

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

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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 Audi Code

1. What does the OBDII code P0747 mean on an Audi?

The code P0747 indicates that the transmission's Pressure Control Solenoid 'A' is stuck in the "on" position, which can affect proper fluid pressure regulation.

2. What are the common symptoms of the P0747 code on an Audi?

Symptoms include harsh or erratic shifting, transmission slipping, inability to shift gears, reduced fuel efficiency, and potentially the transmission entering limp mode.

3. What causes the P0747 code to appear in an Audi?

Common causes include a faulty pressure control solenoid, transmission fluid contamination, clogged fluid passages, electrical issues like damaged wiring or connectors, or a malfunctioning transmission control module (TCM).

4. Can dirty transmission fluid trigger the P0747 code?

Yes, dirty or low-quality transmission fluid can cause solenoids to stick or clog, leading to the P0747 code.

5. How do you diagnose the P0747 code on an Audi?

Diagnosis involves scanning for codes, inspecting the transmission fluid condition, testing the solenoid's electrical circuit, and potentially removing the solenoid to check for mechanical issues.

6. Can you drive an Audi with a P0747 code?

Driving with a P0747 code is not recommended, as it can cause further damage to the transmission or lead to unsafe driving conditions.

7. How is the P0747 code fixed on an Audi?

Fixes include replacing the faulty solenoid, performing a transmission fluid flush, repairing wiring or connectors, or reprogramming or replacing the TCM if necessary.

8. How much does it cost to repair an Audi with a P0747 code?

Repair costs vary but typically range from $150 to $400 for solenoid replacement, while a transmission fluid flush may cost around $100 to $250. Extensive repairs can exceed $1,000.

9. Can a failing TCM cause the P0747 code on an Audi?

Yes, a malfunctioning Transmission Control Module (TCM) can mismanage solenoid operation and trigger the P0747 code.

10. What preventive maintenance can help avoid the P0747 code on an Audi?

Regularly servicing the transmission, including fluid changes and using manufacturer-recommended fluids, can help prevent solenoid issues and the P0747 code.

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