EV Diagnostics
Source-backed diagnostic reference

P1109 EV diagnostic code

Secondary Port Throttle System

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

  • BUICK: Secondary Port Throttle System Source
  • CADILLAC: Secondary Port Throttle System Source
  • CHEVY: Secondary Port Throttle System Source
  • CHRYSLER: Secondary Port Throttle System Source
  • FORD: IAT - B Sensor Intermittent Source
  • GM: Secondary Port Throttle System Source
  • GMC: Secondary Port Throttle System Source
  • LINCOLN: IAT B Sensor Intermittent Source
  • MERCURY: IAT B Sensor Intermittent Source
  • OLDSMOBILE: Secondary Port Throttle System Source
  • OTHER: IAT - B Sensor Intermittent Source
  • SATURN: Secondary Port Throttle System Source
  • VOLKSWAGEN: Oxygen Sensor Circuit Bank 2 Sensor 2 Voltage Too Low/Air Leak Source

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