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Engine-Codes – Volkswagen – P0799 Volkswagen

P0799 Volkswagen Code - Pressure Control Solenoid 'C' Intermittent

Quick Answer

The P0799 diagnostic trouble code (DTC) for Volkswagen vehicles specifically refers to an issue with the Pressure Control Solenoid 'C' being intermittent. Common causes include Faulty Pressure Control Solenoid 'C', Wiring or connector issues, Transmission control module malfunction. 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
P0799 Volkswagen indicates Pressure Control Solenoid 'C' Intermittent.
Common causes
Common causes include Faulty Pressure Control Solenoid 'C', Wiring or connector issues, Transmission control module malfunction.
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 11, 2024
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Code P0799 Volkswagen Description

The P0799 diagnostic trouble code (DTC) for Volkswagen vehicles specifically refers to an issue with the Pressure Control Solenoid 'C' being intermittent. This solenoid is a vital component of the transmission system, responsible for regulating hydraulic pressure within the transmission. When this solenoid malfunctions or exhibits intermittent behavior, it can have significant implications for the vehicle's performance and overall drivability.

OBDII Code P0799 Volkswagen - Pressure Control Solenoid 'C' Intermittent
P0799 Volkswagen Code - Pressure Control Solenoid 'C' Intermittent

Common Causes of P0799 Volkswagen

  1. Faulty Pressure Control Solenoid 'C'
  2. Wiring or connector issues
  3. Transmission control module malfunction
  4. Low transmission fluid levels
  5. Mechanical damage within the transmission system

Symptoms of P0799 Volkswagen

  1. Erratic shifting patterns
  2. Harsh gear changes
  3. Delayed engagements
  4. Transmission slipping
  5. Illumination of the Check Engine Light

How to Fix P0799 Volkswagen

  1. Perform a comprehensive diagnostic scan to confirm the P0799 code and identify any additional related issues.
  2. Inspect the Pressure Control Solenoid 'C' for proper operation and electrical connections.
  3. Test the transmission control module for functionality and potential faults.
  4. Check transmission fluid levels and quality, topping up or replacing as necessary.
  5. Repair or replace any faulty components, such as the solenoid, wiring, connectors, or control module.

Cost to Fix P0799 Volkswagen

The typical repair costs for addressing a P0799 code can vary depending on the extent of the issue and the specific components that require repair or replacement. On average, the cost of parts for a new Pressure Control Solenoid 'C' can range from $100 to $300, with additional costs for labor typically amounting to $150 to $300. Overall, the total repair cost can range from $250 to $600, excluding any diagnostic fees or additional repairs that may be necessary. It's important to consult with a qualified mechanic or repair shop to obtain an accurate estimate based on your vehicle's make and model, as well as local labor rates.

What does this mean?

Tech Notes for P0799 Volkswagen

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 P0799 is triggered when the ECM detects an intermittent circuit in shift solenoid valves

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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.

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