Caution / Notice / Hint

HINT: 

• Bank 1 refers to the bank that includes the No. 1 cylinder*.

  *: The No. 1 cylinder is the cylinder which is farthest from the transaxle.

• Bank 2 refers to the bank that does not include the No. 1 cylinder.
• Sensor 1 refers to the sensor closest to the engine assembly.
• Sensor 2 refers to the sensor farthest away from the engine assembly.
• Refer to "Data List / Active Test" [O2 Sensor Heater B1S2, O2 Sensor Heater Current Value B1S2, O2 Sensor Heater B2S2 and O2 Sensor Heater Current Value B2S2].

  Refer to DATA LIST / ACTIVE TEST [12/2019 - 09/2020] , or refer to DATA LIST / ACTIVE TEST [09/2020 - 10/2022]

• When the values for the Data List item O2 Sensor Heater Current Value B1S2 and O2 Sensor Heater Current Value B2S2 are not 0 A, the heater is on.
• Change the fuel injection volume using the Control the Injection Volume for A/F Sensor function provided in the Active Test and monitor the heated oxygen sensor output voltage (Refer to CAUTION / NOTICE / HINT ). If the sensor output voltage does not change (almost no reaction) while performing the Active Test, the sensor may be malfunctioning.
• Read Freeze Frame Data using the GTS. The ECM records vehicle and driving condition information as Freeze Frame Data the moment a DTC is stored. When troubleshooting, Freeze Frame Data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.