EV Diagnostics
Source-backed diagnostic reference

P1156 EV diagnostic code

O2 Sensor Heater Circuit Low Voltage Bank 2 Sensor 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: O2 Sensor Heater Circuit Low Voltage Bank 2 Sensor 2 Source
  • BUICK: HO2S Rich Average Bank 2 Sensor 1 Source
  • CADILLAC: HO2S Rich Average Bank 2 Sensor 1 Source
  • CHEVY: HO2S Rich Average Bank 2 Sensor 1 Source
  • CHRYSLER: HO2S Rich Average Bank 2 Sensor 1 Source
  • GM: HO2S Rich Average Bank 2 Sensor 1 Source
  • GMC: HO2S Rich Average Bank 2 Sensor 1 Source
  • OLDSMOBILE: HO2S Rich Average Bank 2 Sensor 1 Source
  • OTHER: Fuel Select Switch Malfunction Source
  • SATURN: HO2S Rich Average Bank 2 Sensor 1 Source
  • VOLKSWAGEN: Manifold Absolute Pressure Sensor Circuit Open/Short To Ground 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.