P1131

P1131 OBD Code Definition:
P1131 Lack Of HO2S Switch – Sensor Indicates Lean
P1131 OBD Code Description:

Lack Of HO2S Switch – Sensor Indicates Lean is one of the Definitions for the P1131; however your vehicle’s manufacturer may have a different Definition for the P1131 code. Please check below for your specific make.

Possible Symptoms

  • Malfunction Indicator Light (MIL) ON
  • Engine Light ON (or Service Engine Soon Warning Light)

Possible Causes

  • Wiring and/or Connector(s) from/to Oxygen/Lambda Sensor Bank 2 Sensor 1 faulty
  • Oxygen/Lambda Sensor Bank 2 Sensor 1 faulty

Possible Solutions

  • Check Wiring and/or Connector(s) from/to Oxygen/Lambda Sensor Bank 2 Sensor 1
  • Check/Replace Oxygen/Lambda Sensor Bank 2 Sensor 1
    • Check Measuring Value Blocks (MVB)
    • Perform Output Test/Basic Setting

 

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