Caution / Notice / Hint

WARNING: This page is about a different variant/trim than selected.

NOTE:

Inspect the fuses for circuits related to this system before performing the following procedure.
Vehicle Control History may be stored in the hybrid vehicle control ECU if the engine is malfunctioning. Certain vehicle condition information is recorded when Vehicle Control History is stored. Reading the vehicle conditions recorded in both the Freeze Frame Data and Vehicle Control History can be useful for troubleshooting.
For AWD: Refer to VEHICLE CONTROL HISTORY [12/2019 - 11/2023]

For 2WD: Refer to VEHICLE CONTROL HISTORY [12/2019 - 11/2023]

(Select Powertrain in Health Check and then check the time stamp data.)

Refer to DTC CHECK / CLEAR [12/2019 - 10/2022]
If any "Engine Malfunction" Vehicle Control History item has been stored in the hybrid vehicle control ECU, make sure to clear it. However, as all Vehicle Control History items are cleared simultaneously, if any Vehicle Control History items other than "Engine Malfunction" are stored, make sure to perform any troubleshooting for them before clearing Vehicle Control History.
For AWD: Refer to VEHICLE CONTROL HISTORY [12/2019 - 11/2023]

For 2WD: Refer to VEHICLE CONTROL HISTORY [12/2019 - 11/2023]

HINT:

Sensor 1 refers to the sensor closest to the engine assembly.
Sensor 2 refers to the sensor farthest away from the engine assembly.
A low air fuel ratio sensor (sensor 1) current could be caused by a rich air fuel mixture. Check for conditions that would cause the engine to run rich.
A high air fuel ratio sensor (sensor 1) current could be caused by a lean air fuel mixture. Check for conditions that would cause the engine to run lean.
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.