P0771 Mercedes-Benz Code - Shift Solenoid 'E' Performance or Stuck Off
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
- P0771 Mercedes-Benz indicates Shift Solenoid 'E' Performance or Stuck Off.
- 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.
Code P0771 Mercedes-Benz Description
What are the Possible Causes of the DTC P0771 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 P0771 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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0771 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.
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Frequently Asked Questions about P0771 Mercedes-Benz Code
1. What does OBDII code P0771 mean in a Mercedes-Benz?
P0771 indicates a problem with Shift Solenoid 'E,' which may be stuck off or not functioning properly, affecting gear shifting performance.
2. What are the common symptoms of P0771 in a Mercedes-Benz?
Symptoms include erratic or delayed shifting, being stuck in one gear, transmission slipping, or the Check Engine Light illuminating.
3. What causes the P0771 code to appear?
Common causes include a faulty shift solenoid, low or dirty transmission fluid, wiring or connector issues, or internal transmission damage.
4. Can I still drive my Mercedes-Benz with a P0771 code?
Driving with this code is not recommended, as it can lead to further transmission damage and unsafe driving conditions.
5. How do I diagnose the P0771 code in a Mercedes-Benz?
Diagnosis involves checking transmission fluid levels, inspecting wiring and connectors, testing the shift solenoid, and using a scan tool to monitor transmission operation.
6. How do I fix the P0771 code in my Mercedes-Benz?
Repairs may include replacing the shift solenoid, cleaning or changing the transmission fluid, repairing damaged wiring, or addressing internal transmission issues.
7. How much does it cost to fix a P0771 code?
Repair costs vary but may range from $150 to $500 for solenoid replacement, with additional costs if other transmission repairs are needed.
8. Can low transmission fluid cause the P0771 code?
Yes, low or contaminated transmission fluid can disrupt solenoid operation and trigger the P0771 code.
9. Is P0771 a common issue in Mercedes-Benz vehicles?
While not extremely common, P0771 can occur in Mercedes-Benz vehicles, especially if routine transmission maintenance is neglected.
10. How can I prevent the P0771 code from occurring?
Regularly check and replace transmission fluid as per the manufacturer’s recommendations, and address transmission issues promptly.
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