Engine-CodesAudi – P0779 Audi

P0779 Audi Code - Pressure Control Solenoid 'B' Intermittent

Quick Answer

The P0779 code for Audi vehicles indicates an issue with the Pressure Control Solenoid 'B' being intermittent. Common causes include Faulty pressure control solenoid 'B', Damaged wiring or connectors, Low transmission fluid levels. 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
P0779 Audi indicates Pressure Control Solenoid 'B' Intermittent.
Common causes
Common causes include Faulty pressure control solenoid 'B', Damaged wiring or connectors, Low transmission fluid levels.
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.
Table of contents Created and updated by William Orellana on Sep 11, 2024
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Code P0779 Audi Description

The P0779 code for Audi vehicles indicates an issue with the Pressure Control Solenoid 'B' being intermittent. The pressure control solenoid is a vital component of the transmission system, responsible for regulating hydraulic pressure within the transmission. This solenoid plays a crucial role in shifting gears smoothly and efficiently. When this solenoid malfunctions or operates intermittently, it can lead to a range of transmission problems that can affect the vehicle's performance and drivability.

OBDII Code P0779 Audi - Pressure Control Solenoid 'B' Intermittent
P0779 Audi Code - Pressure Control Solenoid 'B' Intermittent

Common Causes of P0779 Audi

  1. Faulty pressure control solenoid 'B'
  2. Damaged wiring or connectors
  3. Low transmission fluid levels
  4. Clogged transmission filter
  5. Internal transmission issues

Symptoms of P0779 Audi

  1. Erratic shifting or gear changes
  2. Harsh or delayed transmission engagement
  3. Transmission slipping or jerking
  4. Decreased fuel efficiency
  5. Illuminated check engine light

How to Fix P0779 Audi

  1. Diagnose the specific cause of the P0779 code using a diagnostic scanner.
  2. Inspect the pressure control solenoid 'B' for any signs of damage or malfunction.
  3. Check the wiring and connectors for any breaks, corrosion, or loose connections.
  4. Verify the transmission fluid level and condition, topping off or replacing as needed.
  5. Replace the pressure control solenoid 'B' if it is found to be faulty, and clear the code from the vehicle's computer system.

Cost to Fix P0779 Audi

The typical repair costs for addressing the P0779 code on an Audi vehicle can range from $200 to $500, including parts and labor. However, it is essential to note that the actual cost can vary based on the specific diagnosis time and labor rates at auto repair shops. Factors such as the location, vehicle make and model, and engine type can influence the overall repair expenses. It is recommended to inquire about local rates for a more accurate estimate before proceeding with the repair.

Tech Notes for P0779 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?

Engine Control Module (ECM) detectes an intermittent condition on the solenoid circuit

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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 P0779 Audi Code

1. What does the OBDII code P0779 mean on an Audi?

P0779 indicates an intermittent issue with the Pressure Control Solenoid 'B', which helps regulate fluid pressure for proper transmission operation.

2. What are the common symptoms of the P0779 code in an Audi?

Symptoms may include harsh or delayed shifting, transmission slipping, decreased fuel efficiency, or the Check Engine Light turning on.

3. What causes the P0779 code to appear in an Audi?

Possible causes include a faulty pressure control solenoid, low transmission fluid, wiring issues, a clogged transmission filter, or internal transmission problems.

4. Can driving with the P0779 code damage my Audi?

Yes, driving with this code can lead to further transmission damage if left unresolved, especially if shifting issues persist.

5. How do I diagnose the P0779 code in my Audi?

Diagnosis typically involves checking the transmission fluid level and condition, inspecting wiring and connectors for damage, testing the solenoid with a multimeter, and performing a transmission pressure test.

6. What repairs are needed to fix the P0779 code on an Audi?

Repairs may include replacing the faulty solenoid, repairing damaged wiring or connectors, cleaning or replacing the transmission filter, or performing a transmission fluid flush.

7. How much does it cost to fix the P0779 code in an Audi?

Repair costs can range from $150 to $500 or more, depending on whether the solenoid needs replacement or if more extensive transmission repairs are required.

8. Can I clear the P0779 code without fixing the issue?

Clearing the code without addressing the underlying problem will likely result in the code returning and could exacerbate transmission issues.

9. Is low transmission fluid a common cause of the P0779 code?

Yes, low or contaminated transmission fluid can lead to improper solenoid operation and trigger the P0779 code.

10. Can a transmission software update fix the P0779 code on an Audi?

In some cases, a software update may resolve the issue if it is related to transmission control module programming, but physical problems with the solenoid or fluid typically require repairs.

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