AutoCodes – Audi – P0747 Audi

P0747 Audi Code - Pressure Control Solenoid 'A' Stuck On

Quick Answer

The Pressure Control (PC) Solenoid Valve 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 Pressure Control Solenoid. 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: P0747 Audi indicates Pressure Control Solenoid 'A' Stuck On.
Common causes: Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Pressure Control Solenoid.
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 4,987

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 29, 2019

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0747 Audi Description

The Pressure Control (PC) Solenoid Valve 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).

OBDII Code P0747 Audi - Pressure Control Solenoid 'A' Stuck On - AutoCodes.com — P0747 Audi Code - Pressure Control Solenoid 'A' Stuck On

What does this mean?

What are the Possible Causes of the DTC P0747 Audi?

Low transmission fluid level
Dirty transmission fluid
Faulty Pressure Control Solenoid
Pressure Control Solenoid harness is open or shorted
Pressure Control Solenoid circuit poor electrical connection

How to Fix the DTC P0747 Audi?

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 P0747 Audi 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 P0747 Audi Code

1. What does the OBDII code P0747 mean on an Audi?

The code P0747 indicates that the transmission's Pressure Control Solenoid 'A' is stuck in the "on" position, which can affect proper fluid pressure regulation.

2. What are the common symptoms of the P0747 code on an Audi?

Symptoms include harsh or erratic shifting, transmission slipping, inability to shift gears, reduced fuel efficiency, and potentially the transmission entering limp mode.

3. What causes the P0747 code to appear in an Audi?

Common causes include a faulty pressure control solenoid, transmission fluid contamination, clogged fluid passages, electrical issues like damaged wiring or connectors, or a malfunctioning transmission control module (TCM).

4. Can dirty transmission fluid trigger the P0747 code?

Yes, dirty or low-quality transmission fluid can cause solenoids to stick or clog, leading to the P0747 code.

5. How do you diagnose the P0747 code on an Audi?

Diagnosis involves scanning for codes, inspecting the transmission fluid condition, testing the solenoid's electrical circuit, and potentially removing the solenoid to check for mechanical issues.

6. Can you drive an Audi with a P0747 code?

Driving with a P0747 code is not recommended, as it can cause further damage to the transmission or lead to unsafe driving conditions.

7. How is the P0747 code fixed on an Audi?

Fixes include replacing the faulty solenoid, performing a transmission fluid flush, repairing wiring or connectors, or reprogramming or replacing the TCM if necessary.

8. How much does it cost to repair an Audi with a P0747 code?

Repair costs vary but typically range from $150 to $400 for solenoid replacement, while a transmission fluid flush may cost around $100 to $250. Extensive repairs can exceed $1,000.

9. Can a failing TCM cause the P0747 code on an Audi?

Yes, a malfunctioning Transmission Control Module (TCM) can mismanage solenoid operation and trigger the P0747 code.

10. What preventive maintenance can help avoid the P0747 code on an Audi?

Regularly servicing the transmission, including fluid changes and using manufacturer-recommended fluids, can help prevent solenoid issues and the P0747 code.