DTC P016A-00: Excessive Time to Enter Closed Loop Air/Fuel Ratio Control [10/2022 - 11/2023]: Description

WARNING: This page is about a different car, the 2025 Toyota Highlander, 2024 Toyota Highlander, and 2023 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.

If an ECM is abnormal, the ECM illuminates the MIL and stores DTC P016A-00.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Note
P016A-00	Excessive Time to Enter Closed Loop Air/Fuel Ratio Control	ECM internal malfunction (2 trip detection logic).	ECM	Comes on	SAE Code: P016A