P1152 OBD Code Definition:
P1152 Lack Of HO2S21 Switch – Sensor Indicates Rich
P1152 OBD Code Description:

Possible Symptoms
  • Engine Light ON (or Service Engine Soon Warning Light)

Possible Causes

  • Mass Air Flow Sensors (G70) faulty
  • Intake Air System faulty/leaking (false Air)
  • Fuel Injector(s) faulty
  • Fuel Pump faulty
  • Exhaust System leaking
  • Secondary Air Injection System faulty/leaking

Possible Solutions

  • Check Mass Air Flow Sensors (G70)
  • Check Intake Air System for Leaks
  • Check Fuel Injector(s)
  • Check Fuel Pump
  • Check Exhaust System for Leaks
  • Check Secondary Air Injection System


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