P1055 Code - Valvetronic Supply Voltage Control Motor High Input
Quick Answer
The P1055 diagnostic trouble code indicates an issue with the Valvetronic supply voltage control motor, specifically a high input. Common causes include Faulty Valvetronic supply voltage control motor, Wiring issues or shorts in the electrical system, Faulty engine control module (ECM). 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 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, Faulty engine control module (ECM).
- 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 P1055 Description
The P1055 diagnostic trouble code indicates an issue with the Valvetronic supply voltage control motor, specifically a high input. The Valvetronic system is a variable valve lift system that is used in BMW engines to improve performance, fuel efficiency, and emissions. The Valvetronic supply voltage control motor is responsible for controlling the supply voltage to the Valvetronic system, which in turn adjusts the valve lift in the engine.
Common Causes of P1055
- Faulty Valvetronic supply voltage control motor
- Wiring issues or shorts in the electrical system
- Faulty engine control module (ECM)
- Poor connections or corrosion in the electrical connectors
- Voltage regulator malfunction
Symptoms of P1055
- Engine misfires or rough idling
- Reduced engine performance or power
- Check engine light illuminated on the dashboard
- Poor fuel efficiency
- Engine stalling or difficulty starting
How to Fix P1055
- Begin by diagnosing the issue with a scan tool to confirm the P1055 code and identify the specific cause.
- Inspect the wiring and electrical connections related to the Valvetronic supply voltage control motor for any damage, corrosion, or loose connections. Repair or replace as necessary.
- Test the voltage regulator to ensure it is functioning correctly. Replace if faulty.
- Replace the Valvetronic supply voltage control motor if it is determined to be the cause of the high input signal.
- Clear the trouble codes, test drive the vehicle, and verify that the issue has been resolved.
Cost to Fix P1055
The cost of repairing a P1055 code can vary depending on the specific cause of the issue and the labor rates in your area. Generally, the cost of parts for a Valvetronic supply voltage control motor can range from $200 to $500, with labor costs adding an additional $100 to $300. Overall, the total repair cost for this issue could be in the range of $300 to $800. It's important to note that these are rough estimates, and actual costs may differ based on the vehicle's make and model, as well as the location of the repair shop. It's recommended to obtain quotes from local auto repair shops to get a more accurate cost estimate.
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Code P1055 Information for Specific Makes
- P1055 Audi — Bank 1 Camshaft Adjustment Short To B+
- P1055 BMW — Valvetronic Supply Voltage Control Motor High Input
- P1055 Dodge — Idle RPM Low
- P1055 MINI — Valvetronic Supply Voltage Control Motor High Input
- P1055 Volkswagen — Bank 1 Camshaft Adjustment Short To B+
Frequently Asked Questions about P1055 Code
1. What are the common symptoms of OBDII code P1055 (Valvetronic Supply Voltage Control Motor High Input)?
- Common symptoms include rough idling, loss of power, decreased fuel efficiency, and the vehicle going into limp mode.
2. What can cause OBDII code P1055 to trigger?
- This code is typically triggered by issues with the valvetronic supply voltage control motor, such as a faulty motor, damaged wiring, or a poor electrical connection.
3. How serious is OBDII code P1055?
- While the severity can vary, it is important to address this code promptly to prevent further damage to the engine and to ensure optimal vehicle performance.
4. How can I diagnose the cause of OBDII code P1055?
- Diagnosing this code usually involves inspecting the valvetronic supply voltage control motor, checking for wiring issues, and using a diagnostic scanner to gather more information about the problem.
5. Can I continue driving with OBDII code P1055 present?
- It is not recommended to continue driving with this code present, as it can lead to more severe issues over time and may result in further damage to the vehicle.
6. How can OBDII code P1055 be repaired?
- Repairing this code often involves replacing the valvetronic supply voltage control motor, repairing any damaged wiring, and clearing the code with a diagnostic scanner.
7. Is it possible to prevent OBDII code P1055 from occurring?
- Regular maintenance and inspections of the valvetronic system can help prevent this code from occurring. Ensuring proper electrical connections and addressing any issues promptly can also help prevent this code.
8. Can a DIY enthusiast repair OBDII code P1055 at home?
- While some DIY enthusiasts may be able to replace the valvetronic supply voltage control motor or address wiring issues, it is recommended to consult a professional mechanic for an accurate diagnosis and repair.
9. How much does it typically cost to repair OBDII code P1055?
- The cost of repairing this code can vary depending on the extent of the issue, the cost of parts, and labor rates. It is advisable to obtain quotes from multiple mechanics to compare prices.
10. Will OBDII code P1055 cause my vehicle to fail an emissions test?
- Yes, this code can cause a vehicle to fail an emissions test, as it indicates a problem with the valvetronic system, which can impact emissions output. Addressing this code promptly is crucial for passing emissions tests.
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