AutoCodes – Mercedes-Benz – P0774 Mercedes-Benz

P0774 Mercedes-Benz Code - Shift Solenoid 'E' Intermittent

Quick Answer

Shift solenoid valve 'E' 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 'E' 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: P0774 Mercedes-Benz indicates Shift Solenoid 'E' Intermittent.
Common causes: Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty shift solenoid 'E' 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 4,686

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 Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0774 Mercedes-Benz Description

OBDII Code P0774 Mercedes-Benz - Shift Solenoid 'E' Intermittent - AutoCodes.com — P0774 Mercedes-Benz Code - Shift Solenoid 'E' Intermittent

What does this mean?

What are the Possible Causes of the DTC P0774 Mercedes-Benz?

Low transmission fluid level
Dirty transmission fluid
Faulty shift solenoid 'E' valve
Shift solenoid 'E' valve harness is open or shorted
Shift solenoid 'E' valve circuit poor electrical connection

How to Fix the DTC P0774 Mercedes-Benz?

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 P0774 Mercedes-Benz 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.

Need more information about the P0774 Mercedes-Benz code?

Need more information on how to fix the P0774 Mercedes-Benz code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0774 Mercedes-Benz code diagnosed by a professional: Find a repair shop in your area

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 P0774 Mercedes-Benz Code

1. What does the OBDII code P0774 on a Mercedes-Benz mean?

P0774 indicates an issue with the shift solenoid "E" in the transmission, specifically an intermittent fault that disrupts proper gear shifting.

2. What are the common symptoms of code P0774 in a Mercedes-Benz?

Symptoms include erratic shifting, delayed gear engagement, transmission slipping, reduced fuel efficiency, and the Check Engine Light turning on.

3. What causes the P0774 code in a Mercedes-Benz?

Common causes include a faulty shift solenoid, electrical connection issues, low or dirty transmission fluid, or internal transmission damage.

4. Can driving with a P0774 code damage my Mercedes-Benz?

Yes, driving with this code can cause further transmission issues and lead to costly repairs if not addressed promptly.

5. How do I fix the P0774 code on a Mercedes-Benz?

Repairs may include replacing the shift solenoid, cleaning or replacing transmission fluid, inspecting and repairing wiring or connectors, or addressing internal transmission damage.

6. How can I diagnose the P0774 code on my Mercedes-Benz?

Diagnosis involves using an OBDII scanner, checking transmission fluid levels and condition, inspecting solenoid wiring, and testing the shift solenoid for proper operation.

7. How much does it cost to repair the P0774 code on a Mercedes-Benz?

Repair costs vary depending on the issue but can range from $200-$600 for solenoid replacement or higher if transmission damage is present.

8. Can low transmission fluid trigger the P0774 code?

Yes, low or contaminated transmission fluid can cause intermittent shift solenoid issues, leading to the P0774 code.

9. Is the P0774 code specific to Mercedes-Benz vehicles?

No, the P0774 code is a generic OBDII code but may have specific implications for Mercedes-Benz transmissions.

10. Do I need a mechanic to fix the P0774 code on my Mercedes-Benz?

While some issues, like fluid replacement, can be done at home, diagnosing and repairing electrical or internal transmission problems typically require a qualified mechanic.