EV Diagnostics
Source-backed diagnostic reference

P1143 EV diagnostic code

HO2S Bank 1 Sensor 3 Lean Or Low Voltage

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: HO2S Bank 1 Sensor 3 Lean Or Low Voltage Source
  • CADILLAC: HO2S Bank 1 Sensor 3 Lean Or Low Voltage Source
  • CHEVY: HO2S Bank 1 Sensor 3 Lean Or Low Voltage Source
  • CHRYSLER: HO2S Bank 1 Sensor 3 Lean Or Low Voltage Source
  • GM: HO2S Bank 1 Sensor 3 Lean Or Low Voltage Source
  • GMC: HO2S Bank 1 Sensor 3 Lean Or Low Voltage Source
  • JAGUAR: Air Assisted Injector Control Valve Range Performance Source
  • MAZDA: HO2S Bank 1 Sensor 3 Signal Below 0.45v AF Ratio Too Lean Source
  • OLDSMOBILE: HO2S Bank 1 Sensor 3 Lean Or Low Voltage Source
  • OTHER: Air Assist Control Valve Range/Performance Source
  • SATURN: HO2S Bank 1 Sensor 3 Lean Or Low Voltage Source
  • SUBARU: Pressure Sensor Circuit Low Input Source
  • VOLKSWAGEN: Load Calculation Cross Check Upper Limit Exceeded Source

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