AutoCodes – Volkswagen – P0790 Volkswagen

P0790 Volkswagen Code - Normal/Performance Switch Circuit Malfunction

Quick Answer

The Transmission Control Module (TCM) monitors the Normal/Performance Switch signal. Common causes include Faulty Normal/Performance Switch, Normal/Performance Switch harness is open or shorted, Normal/Performance Switch 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: P0790 Volkswagen indicates Normal/Performance Switch Circuit Malfunction.
Common causes: Common causes include Faulty Normal/Performance Switch, Normal/Performance Switch harness is open or shorted, Normal/Performance Switch 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 4,658

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 May 08, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0790 Volkswagen Description

The Transmission Control Module (TCM) monitors the Normal/Performance Switch signal. The TCM sets the OBDII code when the Normal/Performance Switch is not to factory specifications.

OBDII Code P0790 Volkswagen - Normal/Performance Switch Circuit Malfunction - AutoCodes.com — P0790 Volkswagen Code - Normal/Performance Switch Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC P0790 Volkswagen?

Faulty Normal/Performance Switch
Normal/Performance Switch harness is open or shorted
Normal/Performance Switch circuit poor electrical connection

How to Fix the DTC P0790 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 P0790 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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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 P0790 Volkswagen Code

1. What are the common symptoms of OBDII code P0790 in a Volkswagen?

- Common symptoms include difficulty shifting gears, harsh shifting, delayed engagement when shifting, and the transmission going into limp mode.

2. What typically causes the Normal/Performance Switch Circuit Malfunction (P0790) in a Volkswagen?

- The most common causes of this code in a Volkswagen are a faulty normal/performance switch, damaged wiring or connectors related to the switch circuit, or a defective transmission control module (TCM).

3. How can I diagnose the OBDII code P0790 in my Volkswagen?

- Diagnosing P0790 involves using a professional OBDII scanner to retrieve the code, checking the normal/performance switch for proper operation, inspecting the wiring and connectors for damage, and testing the TCM for any faults.

4. Can I continue driving my Volkswagen with the P0790 code present?

- It is not recommended to drive your Volkswagen with the P0790 code present, as it can lead to further transmission issues and potential safety hazards. It's best to address the problem promptly.

5. How can I repair the Normal/Performance Switch Circuit Malfunction in my Volkswagen?

- Repair options for P0790 include replacing the faulty normal/performance switch, repairing damaged wiring or connectors, or replacing the TCM if it is found to be the root cause of the issue.

6. Will resetting the OBDII code P0790 make it go away permanently in my Volkswagen?

- Simply resetting the code may temporarily make the warning light disappear, but the underlying issue causing P0790 will persist. It is crucial to diagnose and address the root cause of the code.

7. Are there any DIY fixes for the OBDII code P0790 in a Volkswagen?

- While some basic checks like inspecting wiring connections can be done DIY, diagnosing and repairing the Normal/Performance Switch Circuit Malfunction often requires specialized tools and expertise, best handled by a professional mechanic.

8. Can a malfunctioning normal/performance switch cause other transmission problems in a Volkswagen?

- Yes, a faulty normal/performance switch can lead to a range of transmission issues beyond just triggering the P0790 code, such as erratic shifting, gear slippage, and overall transmission performance issues.

9. Is the OBDII code P0790 exclusive to Volkswagen vehicles?

- No, the P0790 code is not exclusive to Volkswagen vehicles. It is a generic OBDII code related to the Normal/Performance Switch Circuit Malfunction that can occur in various makes and models with automatic transmissions.

10. How much can I expect to pay for repairs related to the OBDII code P0790 in my Volkswagen?

- The cost of repairs for P0790 can vary depending on the specific cause of the issue. It is recommended to consult with a trusted mechanic or dealership for an accurate diagnosis and cost estimate.