EV Diagnostics
Source-backed diagnostic reference

P1504 EV diagnostic code

Idle Speed Control Valve Closing Solenoid Control Open Circuit

Reference status: This page preserves source-backed code definitions for discovery. Manufacturer/model applicability, repair steps and safety conclusions are not treated as verified unless a manufacturer-specific verified report is available.

Reference definitions

  • BMW: Idle Speed Control Valve Closing Solenoid Control Open Circuit Source
  • BUICK: Vehicle Speed Output Circuit Source
  • CADILLAC: Vehicle Speed Output Circuit Source
  • CHEVY: Vehicle Speed Output Circuit Source
  • CHRYSLER: Vehicle Speed Output Circuit Source
  • FORD: Intake Air Control Circuit Malfunction Source
  • GM: Vehicle Speed Output Circuit Source
  • GMC: Vehicle Speed Output Circuit Source
  • LINCOLN: Intake Air Control Circuit Malfunction Source
  • MERCURY: Intake Air Control Circuit Malfunction Source
  • OLDSMOBILE: Vehicle Speed Output Circuit Source
  • OTHER: Idle Air Control Circuit Malfunction Source
  • SATURN: Vehicle Speed Output Circuit Source
  • VOLKSWAGEN: Intake Air System Bypass Leak Detected Source

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