DTC P0418: Secondary Air Injection System Control "A" Circuit; DTC P0419: Secondary Air Injection System Control "B" Circuit [08/2015 - 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 DTC P0412 (Refer to DESCRIPTION Refer to DTC P0412: Secondary Air Injection System Switching Valve "A" Circuit; DTC P0415: Secondary Air Injection System Switching Valve "B" Circuit [08/2017 - 08/2018] ).

DTC No.	DTC Detection Condition	Trouble Area
P0418 P0419	After cold engine starts, all of following conditions met (2 trip detection logic): Secondary Air Injection (AIR) system not operating (air pump OFF, Air Switching Valve [ASV] OFF) Diagnostic signal from Air Injection Control Driver (AID) 20% Battery voltage 8 V or more	Open in air pump drive circuit Air pump AID ECM
P0418 P0419	After cold engine starts, all of following conditions met (2 trip detection logic): Secondary Air Injection (AIR) system operating (air pump ON, Air Switching Valve [ASV] ON) Diagnostic signal from Air Injection Control Driver (AID) 20% Battery voltage 8 V or more	Short between air pump drive circuit and body ground Air pump AID ECM