EV Diagnostics
Source-backed diagnostic reference

P1191 EV diagnostic code

Pre-Catalyst Fuel Trim System Bank 2

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: Pre-Catalyst Fuel Trim System Bank 2 Source
  • BUICK: Intake Air Duct Air Leak Source
  • CADILLAC: Intake Air Duct Air Leak Source
  • CHEVY: Intake Air Duct Air Leak Source
  • CHRYSLER: Intake Air Duct Air Leak Source
  • FORD: Key Line Voltage Source
  • GM: Intake Air Duct Air Leak Source
  • GMC: Intake Air Duct Air Leak Source
  • JAGUAR: O2 Sensor Heater Circuit Open, HArdware Fault Source
  • LINCOLN: Key Line Voltage Source
  • MAZDA: TP Controlled Circuit Source
  • MERCURY: Key Line Voltage Source
  • OLDSMOBILE: Intake Air Duct Air Leak Source
  • OTHER: Key Line Voltage Source
  • SATURN: Intake Air Duct Air Leak Source

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