EV Diagnostics
Source-backed diagnostic reference

P1133 EV diagnostic code

O2 Sensor Heater Control Circuit Bank 2 Sensor 1

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: O2 Sensor Heater Control Circuit Bank 2 Sensor 1 Source
  • BUICK: HO2S Insufficient Switching Source
  • CADILLAC: HO2S Insufficient Switching Source
  • CHEVY: HO2S Insufficient Switching Source
  • CHRYSLER: HO2S Insufficient Switching Source
  • FORD: Bank 1 Fuel Control Shifted Lean Source
  • GM: HO2S Insufficient Switching Source
  • GMC: HO2S Insufficient Switching Source
  • LEXUS: Air/Fuel Ratio Sensor Circuit Response Malfunction Bank 1 Sensor 1 Source
  • LINCOLN: Bank 1 Fuel Control Shifted Lean Source
  • MAZDA: Bank 1 Fuel Control Shifted Lean Source
  • MERCURY: Bank 1 Fuel Control Shifted Lean Source
  • OLDSMOBILE: HO2S Insufficient Switching Source
  • OTHER: HO2S Insufficient Switching Sensor 1 Source
  • SATURN: HO2S Insufficient Switching Source
  • TOYOTA: Air/Fuel Sensor Circuit Response Bank 1 Sensor 1 Source
  • VOLKSWAGEN: Oxygen Sensor Heating Circuit Bank 1 + 2 Sensor 1 Electrical Malfunction Source
  • GENERIC: HO2S Insufficient Switching Sensor 1 Source

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