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DTC P0130 & P0150 - HEATED OXYGEN SENSOR FAULT Lexus LS II

DTCDefinition
P0130Heated Oxygen Sensor Fault (Bank No. 1, Sensor No. 1)
P0150Heated Oxygen Sensor Fault (Bank No. 2, Sensor No. 1)

DTC P0130 & P0150 DEFINITION

Note. Bank No. 1 refers to bank that includes cylinder No. 1. Bank No. 2 refers to bank without cylinder No. 1. Sensor No. 1 refers to sensor closest to engine block.

CAUTIONIf ECM replacement is instructed in following testing, always ensure ECM harness connector and ground circuit are okay. If either are suspect, repair and repeat testing to confirm ECM malfunction.

Circuit Description

DTC P0130 is set when bank No. 1, sensor No. 1 voltage remains at .4 volt or more, or .6 volt or less during idle, once engine is at normal operating temperature. DTC P0150 is set when bank No. 2, sensor No. 1 voltage remains at .4 volt or more, or .6 volt or less during idle, once engine is at normal operating temperature. Possible causes are

  1. Heated oxygen sensor.
  2. Fuel trim malfunction.