Circuit Description

Refer to DTC P0130: Oxygen Sensor Circuit (Bank 1 Sensor 1), DTC P0150: Oxygen Sensor Circuit (Bank 2 Sensor 1), DTC P2195: Oxygen Sensor Signal Stack Lean (Bank 1 Sensor 1), DTC P2196: Oxygen Sensor Signal Stack Rich (Bank 1 Sensor 1), DTC P2197: Oxygen Sensor Signal Stack Lean (Bank 2 Sensor 1), DTC P2198: Oxygen Sensor Signal Stack Rich (Bank 2 Sensor 1) 

Fig 1: DTC P0134 & P0154 Chart

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

• Bank 1 refers to bank that includes cylinder No. 1.
• Bank 2 refers to bank that does not includes cylinder No. 1.
• Sensor 1 refers to the sensor closer to the engine assembly.
• After confirming DTC P0134 and P0154, check the output voltage of the heated oxygen sensor in the "DIAGNOSIS / ENHANCE OBD II / DATALIST / ALL" using the OBD II scan tool or the hand-held tester. If output voltage of the heated oxygen sensor is always less than 0.1 V, heated oxygen sensor circuit may be open or short.