What does code P1504 mean on BMW vehicles?
The ECU detects an open circuit in the closing solenoid control of the idle speed control valve.
OBD-II Code BMW
P1504 — BMW — Idle Speed Control Valve Closing Solenoid Control Open Circuit
The ECU detects an open circuit in the closing solenoid control of the idle speed control valve.
Common symptoms
- Engine stalls at idle
Possible causes
- Disconnected wiring
- loose connector
- open circuit
Initial recommendation
Inspect wiring connections and repair open circuit in closing solenoid control.
Safety notice
This information is for guidance only. Brand-specific codes may vary by model, year, engine, transmission and vehicle configuration. It does not replace a physical inspection or diagnosis by a qualified mechanic. If the vehicle is unsafe to operate, avoid driving it and seek professional inspection.
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