AutoCodes – Subaru – P0756 Subaru

P0756 Subaru Code - Shift Solenoid 'B' Performance or Stuck Off

Quick Answer

Shift solenoid valve B 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 'B' 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: P0756 Subaru indicates Shift Solenoid 'B' Performance or Stuck Off.
Common causes: Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty shift solenoid 'B' 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 8,952

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
Tech Notes
Cost to Diagnose
FAQs
Comments
Add Comment

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

Code P0756 Subaru Description

OBDII Code P0756 Subaru - Shift Solenoid 'B' Performance or Stuck Off - AutoCodes.com — P0756 Subaru Code - Shift Solenoid 'B' Performance or Stuck Off

What does this mean?

What are the Possible Causes of the DTC P0756 Subaru?

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

How to Fix the DTC P0756 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 P0756 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.

Need more information about the P0756 Subaru code?

Need more information on how to fix the P0756 Subaru code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0756 Subaru 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 P0756 Subaru Code

1. What does the OBDII code P0756 mean on a Subaru?

P0756 indicates a problem with the shift solenoid 'B,' which is responsible for controlling the hydraulic flow in the transmission. It may be stuck in the "off" position or not performing as expected.

2. What are the common symptoms of the P0756 code in a Subaru?

Symptoms include harsh or delayed shifting, transmission slipping, inability to shift into certain gears, and in some cases, the vehicle may enter limp mode.

3. What causes the P0756 code to appear in a Subaru?

Common causes include a faulty shift solenoid 'B,' dirty or low transmission fluid, a clogged transmission filter, internal transmission issues, or damaged wiring or connectors in the transmission system.

4. Can driving with the P0756 code damage my Subaru?

Yes, driving with this code can lead to further transmission damage over time, as improper shifting may cause excessive wear on internal components.

5. How can I fix the P0756 code on my Subaru?

Start by checking the transmission fluid level and condition. If the fluid is dirty or low, replace or refill it. You may also need to inspect and replace the shift solenoid or repair damaged wiring.

6. How do I know if my shift solenoid 'B' is faulty?

A faulty shift solenoid 'B' may cause erratic shifting, inability to select certain gears, or the transmission staying in one gear. Testing the solenoid with a multimeter or consulting a mechanic can confirm the issue.

7. Is it expensive to repair the P0756 code on a Subaru?

Repair costs vary depending on the issue. Replacing a shift solenoid may cost $150â€“$400, while more extensive transmission repairs could cost significantly more.

8. Can low transmission fluid cause the P0756 code in a Subaru?

Yes, low or dirty transmission fluid can cause improper hydraulic pressure, leading to solenoid malfunctions and triggering the P0756 code.

9. Do I need a mechanic to fix the P0756 code on my Subaru?

Minor issues like low transmission fluid can be fixed without a mechanic, but diagnosing and replacing the shift solenoid or repairing internal transmission components usually requires professional help.

10. Will clearing the P0756 code solve the problem in my Subaru?

Clearing the code will turn off the check engine light temporarily, but it wonâ€™t fix the underlying issue. The code will likely return unless the root cause is addressed.