AutoCodes – Subaru – P0771 Subaru

P0771 Subaru 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 Subaru 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.

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Code Popularity 11,633

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 P0771 Subaru Description

OBDII Code P0771 Subaru - Shift Solenoid 'E' Performance or Stuck Off - AutoCodes.com — P0771 Subaru Code - Shift Solenoid 'E' Performance or Stuck Off

What does this mean?

What are the Possible Causes of the DTC P0771 Subaru?

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 Subaru?

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 P0771 Subaru 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 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.