DTC P2444: Secondary Air Injection System Pump Stuck On Bank1; DTC P2445: Secondary Air Injection System Pump Stuck Off Bank1; DTC P2446: Secondary Air Injection System Pump Stuck On Bank 2; DTC P2447: Secondary Air Injection System Pump Stuck Off Bank 2 [08/2017 - 08/2018]: Description

WARNING: This page is about a different car, the 2018 Toyota Sequoia, 2017 Toyota Sequoia, and 2016 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.

Refer to P2440 (Refer to DTC P2440: Secondary Air Injection System Switching Valve Stuck Open Bank1; DTC P2441: Secondary Air Injection System Switching Valve Stuck Close Bank1; DTC P2442: Secondary Air Injection System Switching Valve Stuck Open Bank 2; DTC P2443: Secondary Air Injection System Switching Valve Stuck Closed Bank 2 [08/2017 - 08/2018] ).

DTC No.	DTC Detection Condition	Trouble Area
P2444 P2446	Secondary air pressure more than 2.4 kPa (18 mmHg) despite ECM commanding air pump to turn off (2 trip detection logic)	Short in air pump circuit Open or short in pressure sensor circuit Air switching valve assembly (Pressure sensor) Air Injection Control Driver (AID) ECM
P2445 P2447	Secondary air pressure less than 2.4 kPa (18 mmHg) despite ECM commanding air pump to turn on (2 trip detection logic)	Air pump Open in air pump circuit Air injection system piping Vacuum hose (pressure sensor - air switching valve) Air switching valve assembly (Pressure sensor) Open or short in pressure sensor circuit Air Injection Control Driver (AID) ECM Open or short in air pump heater circuit Air pump heater relay (AI-HTR)
P2445 P2447	When secondary air injection is on, the amount of air from the air pump is below the threshold (2 trip detection logic).