P1004 BMW Code - Valvetronic Guiding Eccentric Shaft Sensor Solenoid Loss
Quick Answer
The Valvetronic System is a variable valve lift system that, in combination with variable valve timing, allows infinite adjustment of the intake valve timing and duration. Common causes include Reluctor on Valvetronic Eccentric Shaft Sensor poor installation, Faulty Valvetronic Eccentric Shaft Sensor, Valvetronic Eccentric Shaft Sensor harness is open or shorted. 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 Reluctor on Valvetronic Eccentric Shaft Sensor poor installation, Faulty Valvetronic Eccentric Shaft Sensor, Valvetronic Eccentric Shaft Sensor harness is open or shorted.
- 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.
Code P1004 BMW Description
What are the Possible Causes of the DTC P1004 BMW?
- Reluctor on Valvetronic Eccentric Shaft Sensor poor installation
- Faulty Valvetronic Eccentric Shaft Sensor
- Valvetronic Eccentric Shaft Sensor harness is open or shorted
- Valvetronic Eccentric Shaft Sensor circuit poor electrical connection
How to Fix the DTC P1004 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 P1004 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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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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