AutoCodes – Volkswagen – P179C Volkswagen

P179C Volkswagen Code - Main Pressure Valve Electric Fault

Quick Answer

The Engine Control Module (ECM) monitors the Main Pressure Valve. Common causes include Faulty Main Pressure Valve, Main Pressure Valve harness is open or shorted, Main Pressure Valve circuit poor electrical connection. 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: P179C Volkswagen indicates Main Pressure Valve Electric Fault.
Common causes: Common causes include Faulty Main Pressure Valve, Main Pressure Valve harness is open or shorted, Main Pressure Valve circuit poor electrical connection.
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.

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Code Popularity 3,239

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jan 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P179C Volkswagen Description

The Engine Control Module (ECM) monitors the Main Pressure Valve. The ECM sets the OBDII code when the Main Pressure Valve is not to factory specifications.

OBDII Code P179C Volkswagen - Main Pressure Valve Electric Fault - AutoCodes.com — P179C Volkswagen Code - Main Pressure Valve Electric Fault

What does this mean?

What are the Possible Causes of the DTC P179C Volkswagen?

Faulty Main Pressure Valve
Main Pressure Valve harness is open or shorted
Main Pressure Valve circuit poor electrical connection

How to Fix the DTC P179C Volkswagen?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P179C Volkswagen code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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Need more information on how to fix the P179C Volkswagen code? Get Access to Factory Service Manuals

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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 P179C Volkswagen Code

1. What are the common symptoms of OBDII code P179C Main Pressure Valve Electric Fault in a Volkswagen?

- Common symptoms include harsh shifting, transmission slipping, poor acceleration, and the vehicle going into limp mode.

2. What are the possible causes of the Main Pressure Valve Electric Fault (P179C) in a Volkswagen?

- The main pressure valve electric fault can be caused by issues with the valve itself, wiring problems, or faults in the transmission control module.

3. How can I diagnose the Main Pressure Valve Electric Fault (P179C) in my Volkswagen?

- Diagnosing this fault typically involves using a diagnostic scanner to read the OBDII codes, checking the transmission fluid level and condition, and inspecting the valve and its electrical connections.

4. Is it safe to continue driving my Volkswagen with the Main Pressure Valve Electric Fault (P179C) code present?

- It is not recommended to drive the vehicle with this fault present, as it can lead to further damage to the transmission system.

5. Can I repair the Main Pressure Valve Electric Fault (P179C) in my Volkswagen myself?

- While some DIY enthusiasts may attempt to repair this fault, it is generally recommended to have a professional mechanic diagnose and fix the issue due to the complexity of transmission systems.

6. How much does it cost to repair the Main Pressure Valve Electric Fault (P179C) in a Volkswagen?

- The cost of repair can vary depending on the exact cause of the fault, but it may range from a few hundred to over a thousand dollars, including parts and labor.

7. Are there any preventive maintenance steps I can take to avoid the Main Pressure Valve Electric Fault (P179C) in my Volkswagen?

- Regularly servicing the transmission, checking and replacing transmission fluid as needed, and addressing any warning signs promptly can help prevent this fault.

8. Can a faulty main pressure valve cause other issues in my Volkswagen besides triggering the P179C code?

- Yes, a faulty main pressure valve can lead to various transmission problems, including gear slippage, rough shifting, and ultimately transmission failure if not addressed.

9. How long does it typically take to repair the Main Pressure Valve Electric Fault (P179C) in a Volkswagen?

- The repair time can vary depending on the exact cause of the fault and the availability of parts, but it may take a few hours to a full day for a mechanic to diagnose and fix the issue.

10. Will resetting the OBDII code P179C temporarily fix the Main Pressure Valve Electric Fault in my Volkswagen?

- Resetting the code may temporarily clear the fault from the system, but if the underlying issue is not addressed, the code is likely to return, and the symptoms will persist.