EV Diagnostics
Source-backed diagnostic reference

P1550 EV diagnostic code

Idle Speed Control Valve Closing Solenoid Control Circuit Electrical

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 Electrical Source
  • FORD: Power Steering Pressure Sensor Out of Self-Test Range Source
  • LINCOLN: Power Steering Pressure Sensor Out of Self-Test Range Source
  • MERCURY: Power Steering Pressure Sensor Out of Self-Test Range Source
  • NISSAN: TCC Solenoid Valve Source
  • OTHER: PSPS Out Of Self Test Range Source
  • VOLKSWAGEN: Charge Pressure Deviation Source

Search and canonical URL

Capitalization, underscores, hyphens, colons and spaces are normalized to this canonical code identity so alternate scan-tool formats do not create duplicate pages.