AutoCodes – Audi – P0751 Audi

P0751 Audi Code - Shift Solenoid 'A' Performance or Stuck Off

Quick Answer

Shift solenoid valve 'A' is turned ON or OFF by the Transmission Control Module (TCM) in response to signals sent from the park/neutral position (PNP) switch, vehicle speed and Engine Control Module (ECM) (throttle opening). Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty shift solenoid 'A' 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: P0751 Audi indicates Shift Solenoid 'A' Performance or Stuck Off.
Common causes: Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty shift solenoid 'A' 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 6,938

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
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0751 Audi Description

OBDII Code P0751 Audi - Shift Solenoid 'A' Performance or Stuck Off - AutoCodes.com — P0751 Audi Code - Shift Solenoid 'A' Performance or Stuck Off

What does this mean?

What are the Possible Causes of the DTC P0751 Audi?

Low transmission fluid level
Dirty transmission fluid
Faulty shift solenoid 'A' valve
Shift solenoid 'A' valve harness or connectors
Shift solenoid 'A' valve circuit is open or shorted

How to Fix the DTC P0751 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 the a transmission solenoid is stuck off, 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 very dirty, it is recommend changing 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 transmission mechanical 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 P0751 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 P0751 Audi Code

1. What does the OBDII code P0751 mean for an Audi?

P0751 indicates a problem with Shift Solenoid 'A,' which may be stuck in the "off" position or not functioning as expected, causing shifting issues in the transmission.

2. What are the common symptoms of code P0751 in an Audi?

Symptoms may include harsh or delayed shifting, failure to shift gears, transmission slipping, decreased fuel efficiency, or the transmission stuck in one gear.

3. What causes the P0751 code to appear in an Audi?

Common causes include a faulty shift solenoid, low or dirty transmission fluid, electrical issues like damaged wiring or connectors, or internal transmission problems.

4. Can I drive my Audi with a P0751 code?

Driving with a P0751 code is not recommended, as it may lead to further transmission damage or unsafe driving conditions due to gear shifting issues.

5. How do I diagnose the P0751 code on my Audi?

Diagnosis typically involves checking the transmission fluid condition, inspecting the wiring and connectors to the solenoid, testing the shift solenoid 'A,' and scanning for additional codes.

6. How do I fix the P0751 code in an Audi?

Repairs may involve replacing the shift solenoid, cleaning or replacing dirty transmission fluid, repairing damaged wiring, or addressing internal transmission damage.

7. What is the cost of repairing the P0751 code on an Audi?

Repair costs vary but may range from $150 to $400 for solenoid replacement, while more extensive transmission repairs can cost significantly more.

8. Can low transmission fluid cause the P0751 code?

Yes, low or contaminated transmission fluid can cause solenoid performance issues and trigger the P0751 code.

9. Do I need to replace the transmission if I get a P0751 code on my Audi?

Not necessarily; most cases involve repairing or replacing the affected solenoid or addressing fluid and wiring issues. A full transmission replacement is only needed for severe internal damage.

10. How can I prevent the P0751 code from recurring in my Audi?

Regularly maintain your transmission by changing the fluid as recommended, inspecting wiring and connectors, and addressing any transmission issues promptly.