CarFaultIQ

OBD-II Code Decoder

Search the licensed P, B, C, and U reference library by code, definition, system, or manufacturer. Reference-only results are not a complete diagnosis.

  • 12,128 OBD-II codes
  • 18,805 reference definitions
  • 16,185 publicly searchable across 10,181 codes

Review-withheld definitions are excluded; lookup records are not published diagnostic pages.

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P1131 — vehicles with official records naming this code

P1131 is named in NHTSA-published manufacturer communications or investigations for 7 vehicle families, including:

A code named in a manufacturer communication means the document refers to it for those vehicles. It is not a diagnosis of any car, and it does not mean the code is common on that vehicle.

Matching definitions: 15 · Unique codes: 1.

Code Meaning System Scope Manufacturer Severity
P1131 HO2S Circuit Low Variance Bank 1 Sensor 2 Powertrain Manufacturer-specific Buick Not classified
P1131 HO2S Circuit Low Variance Bank 1 Sensor 2 Powertrain Manufacturer-specific Cadillac Not classified
P1131 HO2S Circuit Low Variance Bank 1 Sensor 2 Powertrain Manufacturer-specific Chevrolet Not classified
P1131 HO2S Circuit Low Variance Bank 1 Sensor 2 Powertrain Manufacturer-specific Chrysler Not classified
P1131 Lack of Upstream Heated Oxygen Sensor Switch Sensor Indicates Lean Bank 1 Powertrain Manufacturer-specific Ford Not classified
P1131 HO2S Circuit Low Variance Bank 1 Sensor 2 Powertrain Manufacturer-specific General Motors Not classified
P1131 Lack Of HO2S Switch - Sensor Indicates Lean Powertrain Generic Not manufacturer-specific Not classified
P1131 HO2S Circuit Low Variance Bank 1 Sensor 2 Powertrain Manufacturer-specific GMC Not classified
P1131 Lack of Upstream Heated Oxygen Sensor Switch Sensor Indicates Lean Bank 1 Powertrain Manufacturer-specific Lincoln Not classified
P1131 HO2S Bank 1 Sensor 1 Signal Below 0.45v AF Ratio Too Lean Powertrain Manufacturer-specific Mazda Not classified
P1131 Lack of Upstream Heated Oxygen Sensor Switch Sensor Indicates Lean Bank 1 Powertrain Manufacturer-specific Mercury Not classified
P1131 HO2S Circuit Low Variance Bank 1 Sensor 2 Powertrain Manufacturer-specific Oldsmobile Not classified
P1131 HO2S Circuit Low Variance Bank 1 Sensor 2 Powertrain Manufacturer-specific Saturn Not classified
P1131 Front Oxygen Sensor Circuit Malfunction Short Circuit Powertrain Manufacturer-specific Subaru Not classified
P1131 Bank 2 Sensor 1 Resistance Too High Powertrain Manufacturer-specific Volkswagen Not classified