AutoCodes – Volkswagen – P0746 Volkswagen

P0746 Volkswagen Code - Pressure Control Solenoid 'A' Performance Or Stuck Off

Quick Answer

The Pressure Control (PC) Solenoid Valve is an electronic pressure regulator that controls transmission line pressure based on current flow through its coil windings. Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty line pressure solenoid valve. 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: P0746 Volkswagen indicates Pressure Control Solenoid 'A' Performance Or Stuck Off.
Common causes: Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty line pressure solenoid valve.
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 20,731

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 Jul 30, 2022

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0746 Volkswagen Description

The Pressure Control (PC) Solenoid Valve is an electronic pressure regulator that controls transmission line pressure based on current flow through its coil windings. As current flow is increased, the magnetic field produced by the coil moves the solenoid’s plunger further away from the exhaust port. Opening the exhaust port decreases the output fluid pressure regulated by the PC solenoid valve, which ultimately decreases line pressure. The line pressure solenoid valve regulates the oil pump discharge pressure to suit the driving condition in response to a signal sent from the Transmission Control Module (TCM). The Diagnostic Trouble Code (DTC) will be set when the gear required by the Engine Control Module (ECM) does not match the actual gear when driving.

OBDII Code P0746 Volkswagen - Pressure Control Solenoid 'A' Performance Or Stuck Off - AutoCodes.com — P0746 Volkswagen Code - Pressure Control Solenoid 'A' Performance Or Stuck Off

What does this mean?

What are the Possible Causes of the DTC P0746 Volkswagen?

Low transmission fluid level
Dirty transmission fluid
Faulty line pressure solenoid valve
Line pressure solenoid valve harness is open or shorted
Line pressure solenoid valve circuit poor electrical connection

How to Fix the DTC P0746 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 does this mean?

Code Tech Notes

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0746 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 P0746 Volkswagen Code

1. What are the common symptoms of OBDII code P0746 in a Volkswagen?

- Common symptoms include harsh shifting, transmission slippage, decreased fuel efficiency, and illuminated Check Engine Light.

2. What does the OBDII code P0746 Volkswagen indicate?

- The code P0746 indicates a problem with the Pressure Control Solenoid 'A' in the transmission, either due to performance issues or being stuck off.

3. What are the possible causes of OBDII code P0746 in a Volkswagen?

- Possible causes include a faulty pressure control solenoid 'A', low transmission fluid levels, dirty or contaminated transmission fluid, or electrical issues.

4. How serious is OBDII code P0746 in a Volkswagen?

- This code should be addressed promptly as it can lead to further transmission damage if left unresolved, potentially resulting in costly repairs.

5. Can I continue driving my Volkswagen with OBDII code P0746?

- It is not recommended to drive your vehicle with this code present, as it can cause further damage to the transmission and result in unsafe driving conditions.

6. How can I diagnose OBDII code P0746 in my Volkswagen?

- Diagnosis typically involves using a scan tool to retrieve the code, checking the transmission fluid level and condition, and inspecting the pressure control solenoid 'A' for any visible issues.

7. How can I repair OBDII code P0746 in my Volkswagen?

- Repair options may include replacing the pressure control solenoid 'A', performing a transmission fluid flush and filter replacement, or addressing any electrical issues causing the code.

8. Can I reset the Check Engine Light after fixing OBDII code P0746 in my Volkswagen?

- Yes, once the underlying issue causing the code has been resolved, the Check Engine Light can be reset using an OBDII scan tool to clear the code.

9. Will OBDII code P0746 cause my Volkswagen to go into limp mode?

- In some cases, this code can trigger the transmission to go into limp mode to prevent further damage, limiting the vehicle's speed and performance until the issue is addressed.

10. How much does it cost to fix OBDII code P0746 in a Volkswagen?

- The cost of fixing this code can vary depending on the root cause of the issue, but it is advisable to consult a professional technician for an accurate diagnosis and cost estimate.