P1137 OBD Code Definition:
P1137 Lack Of HO2S Switch Sensor Indicates Lean
P1137 OBD Code Description:

Lack Of HO2S Switch Sensor Indicates Lean is one of the Definitions for the P1137; however your vehicle’s manufacturer may have a different Definition for the P1137 code. Please check below for your specific make.

Possible Symptoms

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

Possible Causes

  • Mass Air Flow (MAF) Sensor faulty
  • Fuel Pressure Regulator faulty
  • Fuel Injector(s) faulty
  • Oxygen Sensor Control faulty
    • Oxygen Sensor(s) faulty
  • Evaporative Emission (EVAP) System faulty

Possible Solutions

  • Check Mass Air Flow (MAF) Sensor
  • Check Fuel Pressure Regulator
  • Check Fuel Injector(s)
  • Check Oxygen Sensor Control
    • Check Oxygen Sensor(s)
  • Check Evaporative Emission (EVAP) System


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