P1444 on Lexus

Secondary air switching valve No. 2 stuck open (Toyota, Lexus)

Severity: Monitor

It is an emissions-system fault that turns the check engine light on. A Sequoia complaint reports poor acceleration with it, so watch drivability.

It gets more serious if:

Inspect soon: Inspect soon if the engine loses power or the traction and stability lights come on with the check engine light, as one Sequoia owner reported.

Source: how we rate severity

This page covers only what differs on Lexus. For what P1444 means, the ranked causes and the test order, see the P1444 guide.

What's different on Lexus

Lexus

2006 · GX
Supported by vehicle data
A 2006 GX470 owner lists P1441/P1444 among secondary air system codes.

Sources and review

NHTSA complaint ODI 11184806 (2006 Lexus GX470, secondary air codes) — NHTSA Office of Defects Investigation (consumer complaint)
Toyota T-SB-0230-12 Rev: secondary air injection codes on 2UZ-FE 4.7 L engines — Toyota Motor Sales via NHTSA , April 2, 2018
NHTSA complaint ODI 10630704 (2005 Toyota Sequoia, P1444) — NHTSA Office of Defects Investigation (consumer complaint)

Last reviewed: October 16, 2026
Written by: Saurabh K.
Editorial review: Pending
Technician review: Technician review pending

This page explains what a code usually means; it is not a substitute for a professional inspection. How we source and review · Report an error