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Engine-Codes – BMW – P1055 BMW

P1055 BMW Code - Valvetronic Supply Voltage Control Motor High Input

Quick Answer

The P1055 BMW code indicates a problem with the Valvetronic supply voltage control motor, specifically a high input voltage being detected. Common causes include Faulty Valvetronic supply voltage control motor, Wiring issues or shorts in the electrical system, Malfunctioning control module. 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
P1055 BMW indicates Valvetronic Supply Voltage Control Motor High Input.
Common causes
Common causes include Faulty Valvetronic supply voltage control motor, Wiring issues or shorts in the electrical system, Malfunctioning control module.
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 07, 2024
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Code P1055 BMW Description

The P1055 BMW code indicates a problem with the Valvetronic supply voltage control motor, specifically a high input voltage being detected. The Valvetronic system is responsible for adjusting the lift of the intake valves, allowing for better engine efficiency and performance. The supply voltage control motor is a crucial component of this system, as it regulates the voltage supplied to the motor that controls the Valvetronic mechanism.

OBDII Code P1055 BMW - Valvetronic Supply Voltage Control Motor High Input
P1055 BMW Code - Valvetronic Supply Voltage Control Motor High Input

Common Causes of P1055 BMW

  1. Faulty Valvetronic supply voltage control motor
  2. Wiring issues or shorts in the electrical system
  3. Malfunctioning control module
  4. Poor connection or corrosion in the circuit

Symptoms of P1055 BMW

  1. Rough idling or engine misfiring
  2. Decreased fuel efficiency
  3. Loss of power during acceleration
  4. Check Engine Light illuminated on the dashboard

How to Fix P1055 BMW

  1. Begin by diagnosing the issue using a diagnostic scanner to confirm the P1055 BMW code and pinpoint the exact cause of the high input voltage.
  2. Inspect the Valvetronic supply voltage control motor, wiring, and connections for any signs of damage or wear. Replace any faulty components as necessary.
  3. Test the control module to ensure it is functioning correctly. Replace if it is found to be defective.
  4. Clear the error code and reset the system to see if the issue has been resolved.
  5. Test drive the vehicle to ensure that the symptoms associated with the P1055 BMW code have been eliminated.

Cost to Fix P1055 BMW

The cost of repairing a P1055 BMW code can vary depending on the specific cause of the issue and the labor rates in your area. On average, you can expect to pay between $200 and $500 for parts and labor to address this problem. Keep in mind that diagnostic time and labor rates can impact the final cost, so it's advisable to get a quote from a reputable auto repair shop in your area.

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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 P1055 BMW Code

1. What are the common symptoms of OBDII code P1055 in a BMW related to the Valvetronic Supply Voltage Control Motor High Input?

The common symptoms include rough idling, loss of power or acceleration, engine misfires, and possible stalling.

2. What are the potential causes of OBDII code P1055 in a BMW?

The code P1055 typically indicates a problem with the Valvetronic supply voltage control motor circuit, which could be caused by a faulty control motor, wiring issues, or a malfunctioning engine control module (ECM).

3. How can I diagnose the cause of OBDII code P1055 in my BMW?

A thorough diagnostic procedure involves checking the wiring harness for any damage, testing the Valvetronic supply voltage control motor, and verifying the signals between the motor and the ECM using a multimeter or a BMW diagnostic tool.

4. Is it safe to continue driving my BMW with OBDII code P1055 present?

It is not recommended to drive your BMW with the code P1055 active, as it can lead to further engine damage or unsafe driving conditions due to potential power loss or stalling.

5. Can I reset OBDII code P1055 in my BMW without fixing the underlying issue?

While you can clear the code using an OBDII scanner, it is essential to address the root cause of the problem to prevent the code from reappearing and ensure your BMW operates correctly.

6. What are the repair options for fixing OBDII code P1055 in a BMW?

Repair options may include replacing the Valvetronic supply voltage control motor, repairing damaged wiring, or reprogramming the ECM if necessary. Consult a qualified mechanic or BMW specialist for proper diagnosis and repair.

7. How much does it cost to repair OBDII code P1055 in a BMW?

The cost of repairing OBDII code P1055 can vary depending on the extent of the issue, parts needed for replacement, and labor charges. It is advisable to obtain quotes from different repair shops for comparison.

8. Are there any preventive measures to avoid OBDII code P1055 in a BMW?

Regular maintenance, such as checking and replacing worn-out components, inspecting wiring harnesses for damage, and following BMW's recommended service intervals, can help prevent issues leading to OBDII code P1055.

9. Can a DIY enthusiast address OBDII code P1055 in a BMW?

While some simple tasks like checking fuses or visual inspection of wiring can be done by a DIY enthusiast, diagnosing and repairing complex issues related to OBDII code P1055 may require specialized knowledge and tools best handled by a qualified mechanic.

10. How long does it take to repair OBDII code P1055 in a BMW?

The repair time for OBDII code P1055 can vary based on the specific cause of the issue and the expertise of the mechanic. It may range from a few hours to a full day, depending on the complexity of the repair needed.

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