EV Diagnostics
Source-backed diagnostic reference

P1503 EV diagnostic code

Idle Speed Control Valve Closing Solenoid Control Circuit Signal Low

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 Circuit Signal Low Source
  • BUICK: Theft Deterrent System Password Incorrect Source
  • CADILLAC: Theft Deterrent System Password Incorrect Source
  • CHEVY: Theft Deterrent System Password Incorrect Source
  • CHRYSLER: Theft Deterrent System Password Incorrect Source
  • GM: Theft Deterrent System Password Incorrect Source
  • GMC: Theft Deterrent System Password Incorrect Source
  • OLDSMOBILE: Theft Deterrent System Password Incorrect Source
  • OTHER: Auxillary Speed Sensor Fault Source
  • SATURN: Theft Deterrent System Password Incorrect Source
  • VOLKSWAGEN: Load Signal From Generator Range Performance Source

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