AutoCodes – BMW – P1056 BMW

P1056 BMW Code - Valvetronic Supply Voltage Control Motor Low Input

Quick Answer

The Valvetronic (VVT) System is a Variable Valve Lift (VVL) system that, in combination with variable valve timing, allows infinite adjustment of the intake valve timing and duration. Common causes include Faulty Valvetronic Control Motor, Valvetronic Control Motor harness is open or shorted, Valvetronic Control Motor circuit poor electrical connection. 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: P1056 BMW indicates Valvetronic Supply Voltage Control Motor Low Input.
Common causes: Common causes include Faulty Valvetronic Control Motor, Valvetronic Control Motor harness is open or shorted, Valvetronic Control Motor circuit poor electrical connection.
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 44,741

How popular is this code, among other codes? Medium

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 Jul 17, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1056 BMW Description

The Valvetronic (VVT) System is a Variable Valve Lift (VVL) system that, in combination with variable valve timing, allows infinite adjustment of the intake valve timing and duration. The system helps improve fuel economy and emissions and negates the need for a throttle body in regular use. The electronic control of the Valvetronic is dependent on, Voltage Limits, Adaptations, current and power stage temperature. The monitoring function performs an electrical diagnosis Of the DC motor lines. The goal of this function is to detect a short circuit at the VVL output stage. The function uses temperatures from the sensor outputs of the power stage. If the temperature of one power stage is greater than a threshold the function checks the output stage. If a short circuit is detected an error is set.

OBDII Code P1056 BMW - Valvetronic Supply Voltage Control Motor Low Input - AutoCodes.com — P1056 BMW Code - Valvetronic Supply Voltage Control Motor Low Input

What does this mean?

What are the Possible Causes of the DTC P1056 BMW?

Faulty Valvetronic Control Motor
Valvetronic Control Motor harness is open or shorted
Valvetronic Control Motor circuit poor electrical connection

How to Fix the DTC P1056 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1056 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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Need Help with the Code?

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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 P1056 BMW Code

1. What are the common symptoms of OBDII code P1056 in a BMW related to the Valvetronic Supply Voltage Control Motor Low Input?

- Common symptoms include rough idling, loss of power, engine misfires, and decreased fuel efficiency.

2. What can cause the Valvetronic Supply Voltage Control Motor Low Input code P1056 in a BMW?

- Possible causes include a faulty Valvetronic motor, damaged wiring or connectors, low voltage supply, or issues with the engine control module.

3. How can I diagnose the cause of OBDII code P1056 in my BMW?

- To diagnose this issue, you can perform a visual inspection of wiring and connectors, test the voltage supply to the Valvetronic motor, and use an OBDII scanner to read live data and monitor sensor readings.

4. Can I drive my BMW with the P1056 code present?

- It is not recommended to drive your BMW with this code present, as it can lead to further damage to the engine and other components. It's best to address the issue as soon as possible.

5. How can I repair the Valvetronic Supply Voltage Control Motor Low Input code P1056 in my BMW?

- Repair options may include replacing the Valvetronic motor, repairing or replacing damaged wiring or connectors, checking and correcting the voltage supply, and resetting the engine control module.

6. Is it possible to reset the OBDII code P1056 in a BMW without fixing the underlying issue?

- While clearing the code may temporarily turn off the check engine light, it will not fix the root cause of the problem. It's important to address the issue to prevent further damage.

7. Can a DIY enthusiast fix the Valvetronic Supply Voltage Control Motor Low Input code P1056 issue in a BMW?

- Depending on your skill level and access to tools, you may be able to diagnose and repair this issue yourself. However, it's recommended to consult a professional mechanic for complex repairs.

8. How much does it typically cost to repair the P1056 code in a BMW?

- The cost of repairs can vary depending on the exact cause of the issue, parts needed, and labor costs. It's best to get a diagnostic from a trusted mechanic for an accurate estimate.

9. Will the P1056 code cause permanent damage to my BMW if left unresolved?

- Ignoring the P1056 code can potentially cause damage to the engine over time, leading to more costly repairs. It's advisable to address the issue promptly.

10. How long does it take to repair the Valvetronic Supply Voltage Control Motor Low Input code P1056 in a BMW?

- The repair time can vary depending on the exact cause of the issue and the complexity of the repair. It's best to consult with a mechanic for a more accurate estimate of the repair time.