P1504 BMW Code - Idle Speed Control Valve Closing Solenoid Control Open Circuit
Quick Answer
P1504 BMW indicates Idle Speed Control Valve Closing Solenoid Control Open Circuit. Common causes include Faulty Idle Speed Control Valve, Idle Speed Control Valve harness is open or shorted, Idle Speed Control Valve 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
- P1504 BMW indicates Idle Speed Control Valve Closing Solenoid Control Open Circuit.
- Common causes
- Common causes include Faulty Idle Speed Control Valve, Idle Speed Control Valve harness is open or shorted, Idle Speed Control Valve 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.
Code P1504 BMW Description
What are the Possible Causes of the DTC P1504 BMW?
- Faulty Idle Speed Control Valve
- Idle Speed Control Valve harness is open or shorted
- Idle Speed Control Valve poor electrical connection
- Large vacuum leak on engine
How to Fix the DTC P1504 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 P1504 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 P1504 BMW Code
1. What does the OBDII code P1504 mean on a BMW?
P1504 indicates an "Idle Speed Control Valve Closing Solenoid Control Open Circuit," meaning the circuit controlling the idle speed control solenoid has an open or faulty connection.
2. What are the symptoms of code P1504 in a BMW?
Common symptoms include rough idling, stalling at low speeds, difficulty starting, and erratic idle RPM.
3. What causes the P1504 code to appear on a BMW?
Potential causes include a faulty idle speed control valve, damaged wiring or connectors in the control circuit, or a malfunctioning engine control module (ECM).
4. Can I drive my BMW with the P1504 code?
While the car may still run, driving with this issue can lead to stalling or poor performance, especially at idle. It's best to address the problem promptly.
5. How do I fix the P1504 code in my BMW?
Check the idle speed control valve for faults, inspect and repair any damaged wiring or connectors, and clear the code using an OBDII scanner after repairs.
6. How can I test the idle speed control valve for the P1504 code?
You can test the valve using a multimeter to check for proper resistance or by applying voltage to confirm its operation. Refer to your BMW’s service manual for specific values.
7. What tools are needed to diagnose the P1504 code?
An OBDII scanner, a multimeter, and basic hand tools are typically required to diagnose and repair this issue.
8. Could a vacuum leak cause the P1504 code on a BMW?
No, a vacuum leak is unlikely to directly trigger P1504, as it specifically relates to an electrical issue with the idle control valve circuit.
9. How much does it cost to repair the P1504 code on a BMW?
Repair costs can range from $100 to $400, depending on whether the issue is a simple wiring fix or if the idle speed control valve needs replacement.
10. Will cleaning the idle speed control valve fix the P1504 code?
Cleaning the valve might resolve the issue if it's sticking due to dirt or carbon buildup, but an open circuit usually points to an electrical problem that needs addressing.
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