AutoCodes – MINI – P1055 MINI

P1055 MINI Code - Valvetronic Supply Voltage Control Motor High 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: P1055 MINI indicates Valvetronic Supply Voltage Control Motor High 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 1,423

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 Jul 17, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1055 MINI 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 P1055 MINI - Valvetronic Supply Voltage Control Motor High Input - AutoCodes.com — P1055 MINI Code - Valvetronic Supply Voltage Control Motor High Input

What does this mean?

What are the Possible Causes of the DTC P1055 MINI?

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

How to Fix the DTC P1055 MINI?

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 P1055 MINI 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 P1055 MINI Code

1. What does the OBDII code P1055 mean on a MINI?

P1055 indicates a "Valvetronic Supply Voltage Control Motor High Input," meaning the Valvetronic system is detecting an unusually high voltage in the control motor circuit.

2. What are the symptoms of the P1055 code on a MINI?

Symptoms may include rough idling, reduced engine performance, difficulty starting, and a check engine light.

3. What causes the P1055 code on a MINI?

Common causes include a faulty Valvetronic motor, wiring issues such as shorts or corrosion, a malfunctioning engine control module (ECM), or issues with the power supply to the motor.

4. Can I drive my MINI with the P1055 code?

Itâ€™s not recommended to drive with this code active, as it may lead to further engine damage or unsafe driving conditions due to reduced performance.

5. How can I fix the P1055 code on a MINI?

Repairs may involve inspecting and replacing the Valvetronic motor, checking and repairing any damaged wiring, or addressing issues with the ECM or power supply.

6. How do I diagnose the P1055 code on a MINI?

Use an OBDII scanner to confirm the code, then visually inspect the Valvetronic motor, wiring, and connectors for damage or corrosion. Voltage tests can help pinpoint electrical issues.

7. How much does it cost to fix the P1055 code on a MINI?

Repair costs vary but may range from $150 to $1,000 depending on whether the issue is wiring-related or requires Valvetronic motor replacement.

8. Can a weak battery cause the P1055 code on a MINI?

Yes, a weak or failing battery can lead to voltage irregularities in the Valvetronic motor system, potentially triggering this code.

9. Does the P1055 code affect MINI engine performance?

Yes, it can cause reduced engine efficiency, difficulty accelerating, and poor fuel economy due to improper control of the Valvetronic motor.

10. Is the P1055 code common in MINI vehicles?

While not extremely common, it can occur in MINI models equipped with Valvetronic systems, especially if the vehicle has electrical issues or aging components.