AutoCodes – BMW – P0755 BMW

P0755 BMW Code - Shift Solenoid 'B' Malfunction

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: P0755 BMW indicates Shift Solenoid 'B' Malfunction.
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.

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Code Popularity 8,124

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
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0755 BMW Description

OBDII Code P0755 BMW - Shift Solenoid 'B' Malfunction - AutoCodes.com — P0755 BMW Code - Shift Solenoid 'B' Malfunction

What does this mean?

What are the Possible Causes of the DTC P0755 BMW?

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

How to Fix the DTC P0755 BMW?

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 malfunction, 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 P0755 BMW 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 P0755 BMW Code

What does OBDII code P0755 mean for a BMW?

P0755 indicates a malfunction in Shift Solenoid 'B,' which is responsible for controlling fluid flow to enable gear shifts in the transmission.

What are the common symptoms of code P0755 in a BMW?

Symptoms include erratic shifting, inability to change gears, transmission slipping, or the vehicle entering limp mode.

What causes code P0755 in a BMW?

Common causes include electrical issues like damaged wiring or connectors, a faulty shift solenoid, dirty transmission fluid, or a failing transmission control module (TCM).

How can I diagnose code P0755 in my BMW?

Start by checking the wiring and connectors for damage or corrosion, inspect the transmission fluid condition, and test the functionality of Shift Solenoid 'B' using a multimeter or scan tool.

Can a dirty transmission fluid cause code P0755?

Yes, contaminated or low transmission fluid can affect solenoid performance and lead to this error code.

Is it safe to drive a BMW with code P0755?

Driving with P0755 can result in further transmission damage and unsafe driving conditions. Itâ€™s best to address the issue promptly.

How do you fix code P0755 in a BMW?

Repairs may include replacing the faulty shift solenoid, repairing damaged wiring or connectors, flushing and refilling the transmission fluid, or addressing TCM issues.

What tools are needed to fix code P0755?

You may need a scan tool, multimeter, basic hand tools, and transmission fluid replacement tools depending on the root cause.

Can P0755 be triggered by a software issue?

Yes, a malfunctioning transmission control module or outdated software can sometimes cause this code.

How much does it cost to repair code P0755 in a BMW?

Repair costs vary but typically range from $200 to $500 for solenoid replacement, while more complex transmission or TCM repairs can cost significantly more.