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P0771 Subaru Code - Shift Solenoid 'E' Performance or Stuck Off

Quick Answer

The P0771 diagnostic trouble code for Subaru vehicles indicates an issue with the Shift Solenoid 'E,' specifically that it is either not performing as expected or is stuck in the off position. Common causes include Faulty shift solenoid 'E', Low transmission fluid levels, Contaminated or degraded transmission fluid. 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 Subaru indicates Shift Solenoid 'E' Performance or Stuck Off.
Common causes
Common causes include Faulty shift solenoid 'E', Low transmission fluid levels, Contaminated or degraded transmission fluid.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code P0771 Subaru Description

The P0771 diagnostic trouble code for Subaru vehicles indicates an issue with the Shift Solenoid 'E,' specifically that it is either not performing as expected or is stuck in the off position. Shift solenoids are vital components of automatic transmissions, responsible for controlling the flow of transmission fluid and engaging specific gears for smooth shifting. Solenoid 'E' is typically associated with a specific gear ratio in the transmission.

OBDII Code P0771 Subaru - Shift Solenoid 'E' Performance or Stuck Off
P0771 Subaru Code - Shift Solenoid 'E' Performance or Stuck Off

Common Causes of P0771 Subaru

  1. Faulty shift solenoid 'E'
  2. Low transmission fluid levels
  3. Contaminated or degraded transmission fluid
  4. Wiring or electrical issues
  5. Internal transmission problems

Symptoms of P0771 Subaru

  1. Harsh or delayed shifting
  2. Erratic shifting behavior
  3. Transmission getting stuck in a specific gear
  4. Decreased fuel efficiency
  5. Rough idling

How to Fix P0771 Subaru

  1. Diagnose the issue by performing a thorough inspection of the transmission system and conducting a scan to retrieve the trouble codes.
  2. Test the shift solenoid 'E' to determine if it is functioning correctly or if it needs to be replaced.
  3. Check and replenish transmission fluid levels if necessary, and inspect the fluid for any signs of contamination.
  4. Inspect the wiring and electrical connections related to the shift solenoid 'E' for any damage or loose connections.
  5. If the shift solenoid 'E' is found to be faulty, replace it with a new one and ensure proper installation.

Cost to Fix P0771 Subaru

The typical repair costs for addressing a P0771 code on a Subaru vehicle can range from $200 to $500, depending on the specific cause of the issue and the extent of the repairs needed. This estimate includes the cost of the shift solenoid 'E' replacement, any necessary transmission fluid, and the labor involved in diagnosing and repairing the problem. It is essential to note that these costs can vary significantly based on factors such as the location of the repair shop, the vehicle's make and model, and the specific labor rates charged. It is recommended to obtain multiple quotes from reputable auto repair shops to ensure a fair price for the necessary repairs.

What does this mean?

Tech Notes for P0771 Subaru

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.

When is the Code Detected?

The P0771 code is detected when the ECM has detected a mechanical fault with the solenoid energized, valve stuck off

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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 P0771 Subaru Code

1. What are the common symptoms of OBDII code P0771 in a Subaru related to the Shift Solenoid 'E'?

The common symptoms include harsh or delayed shifting, the transmission staying in one gear, poor fuel economy, and the Check Engine light illuminating.

2. What are the possible causes of OBDII code P0771 Shift Solenoid 'E' Performance or Stuck Off in a Subaru?

Potential causes include a faulty shift solenoid 'E', low transmission fluid, electrical issues, a damaged wiring harness, or a malfunctioning transmission control module.

3. How serious is OBDII code P0771 in a Subaru?

If left unaddressed, this code can lead to transmission issues, reduced fuel efficiency, and potential damage to the transmission components. It should be diagnosed and repaired promptly.

4. Can I continue driving my Subaru with OBDII code P0771 Shift Solenoid 'E' Performance or Stuck Off?

It is not recommended to continue driving the vehicle with this code present, as it can cause further damage to the transmission. It is best to have the issue diagnosed and repaired as soon as possible.

5. How can I diagnose OBDII code P0771 in my Subaru?

Diagnosis typically involves using a scan tool to read the code, checking the transmission fluid level and condition, inspecting the wiring and connectors related to the shift solenoid 'E', and conducting a thorough transmission system test.

6. What are some repair tips for fixing OBDII code P0771 in a Subaru?

Repair tips may include replacing the faulty shift solenoid 'E', ensuring proper transmission fluid levels and quality, checking and repairing any damaged wiring, and resetting the ECU after repairs are completed.

7. Can I reset the Check Engine light after fixing OBDII code P0771 in my Subaru?

Yes, once the underlying issue causing the code has been repaired, you can reset the Check Engine light using a scan tool or by disconnecting the car's battery for a few minutes.

8. How much does it typically cost to repair OBDII code P0771 Shift Solenoid 'E' in a Subaru?

The cost of repairs can vary depending on the exact cause of the issue, labor rates in your area, and whether you choose to do the repairs yourself or take your Subaru to a professional mechanic. It's best to get a few quotes for an accurate estimate.

9. How can I prevent OBDII code P0771 from occurring in my Subaru?

To prevent this code, it's important to maintain your vehicle's transmission system by following the manufacturer's recommended maintenance schedule, checking the transmission fluid regularly, and addressing any issues promptly.

10. Is it common for Subaru vehicles to experience OBDII code P0771 related to the Shift Solenoid 'E'?

While it's not the most common issue, some Subaru vehicles may encounter this code due to various factors like wear and tear, electrical issues, or transmission component failures. Regular maintenance and prompt repairs can help prevent this problem.

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