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Engine-Codes – BMW – P1004 BMW

P1004 BMW Code - Valvetronic Guiding Eccentric Shaft Sensor Solenoid Loss

Quick Answer

The P1004 BMW code indicates a problem with the Valvetronic system's Guiding Eccentric Shaft Sensor Solenoid. Common causes include Faulty Valvetronic Guiding Eccentric Shaft Sensor Solenoid, Wiring or connector issues, Electrical problems. 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
P1004 BMW indicates Valvetronic Guiding Eccentric Shaft Sensor Solenoid Loss.
Common causes
Common causes include Faulty Valvetronic Guiding Eccentric Shaft Sensor Solenoid, Wiring or connector issues, Electrical problems.
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 10, 2024
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Code P1004 BMW Description

The P1004 BMW code indicates a problem with the Valvetronic system's Guiding Eccentric Shaft Sensor Solenoid. The Valvetronic system is a technology used by BMW to improve engine efficiency and performance by eliminating the need for a throttle body. Instead, the system varies valve lift to control the amount of air entering the engine, enhancing fuel economy and power output.

OBDII Code P1004 BMW - Valvetronic Guiding Eccentric Shaft Sensor Solenoid Loss
P1004 BMW Code - Valvetronic Guiding Eccentric Shaft Sensor Solenoid Loss

Common Causes of P1004 BMW

  1. Faulty Valvetronic Guiding Eccentric Shaft Sensor Solenoid
  2. Wiring or connector issues
  3. Electrical problems
  4. ECM malfunction
  5. Poor maintenance or wear and tear

Symptoms of P1004 BMW

  1. Reduced engine performance
  2. Decreased fuel efficiency
  3. Rough idling
  4. Engine misfires

How to Fix P1004 BMW

  1. Diagnose the specific cause of the issue using a diagnostic scanner to confirm the P1004 code.
  2. Inspect the Valvetronic system components, including the sensor solenoid, wiring, and connectors, for any visible damage or wear.
  3. Replace the faulty Valvetronic Guiding Eccentric Shaft Sensor Solenoid if necessary.
  4. Clear the code from the ECM memory and perform a test drive to ensure the issue has been resolved.
  5. If the problem persists, further diagnostics may be required to identify any additional underlying issues.

Cost to Fix P1004 BMW

The typical repair costs for addressing a P1004 BMW code can vary depending on the specific cause of the issue and the shop's labor rates. On average, the parts for replacing the Valvetronic Guiding Eccentric Shaft Sensor Solenoid can range from $150 to $300, while the labor costs can range from $200 to $400. Overall, the total repair cost can be estimated to be between $350 and $700. It is essential to consider that additional diagnostic time or other repairs may affect the final cost. It is advisable to obtain quotes from different auto repair shops to find the best deal.

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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 P1004 BMW Code

1. What does the OBDII code P1004 mean on a BMW?

P1004 indicates an issue with the Valvetronic Guiding Eccentric Shaft Sensor Solenoid, which may be malfunctioning or experiencing a loss in communication.

2. What are the common symptoms of code P1004 on a BMW?

Symptoms include rough idling, reduced engine performance, poor fuel efficiency, and possible check engine light illumination.

3. What causes the P1004 code to appear on a BMW?

The code is typically caused by a faulty eccentric shaft sensor, damaged wiring or connectors, or issues with the Valvetronic motor.

4. Can I drive my BMW with the P1004 code active?

Driving with this code active is not recommended, as it may lead to reduced performance and potentially cause further damage to engine components.

5. How can I diagnose the P1004 code on my BMW?

Diagnosis involves scanning for fault codes with an OBDII scanner, inspecting the eccentric shaft sensor, checking the wiring and connectors for damage, and testing the Valvetronic system.

6. How do I fix the P1004 code on a BMW?

Common fixes include replacing the eccentric shaft sensor, repairing or replacing damaged wiring or connectors, and reprogramming or resetting the Valvetronic system if needed.

7. How much does it cost to repair the P1004 code on a BMW?

Repair costs vary, but replacing the eccentric shaft sensor typically costs between $200 and $600, depending on labor rates and parts pricing.

8. Can a faulty eccentric shaft sensor cause other problems?

Yes, a faulty sensor can lead to improper engine timing, reduced fuel efficiency, and increased emissions.

9. Do I need specialized tools to fix the P1004 code on a BMW?

Yes, diagnosing and repairing this issue may require BMW-specific diagnostic tools and equipment to properly reset the Valvetronic system.

10. Can the P1004 code be triggered by low battery voltage?

Yes, low battery voltage or electrical issues can sometimes cause communication errors in the Valvetronic system, triggering the P1004 code.

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