P1440 on Toyota
On Honda and Acura hybrids, motor power inverter module output circuit malfunction; on Toyota, secondary air injection control valve circuit, bank 1
Severity: Inspect soon
On the Honda and Acura hybrids this is an inverter fault in the high-voltage system, and owners report jerking, reduced power and a pull-over warning, so treat it as urgent.
It gets more serious if:
- Stop: Stop somewhere safe and arrange a tow if the car jerks, loses power, shows a pull-over warning or the IMA system stops charging. Two Acura ILX owners describe a sudden jerk and reduced power with this fault.
This page covers only what differs on Toyota. For what P1440 means, the ranked causes and the test order, see the P1440 guide.
What's different on Toyota
ToyotaYour car
2005–2007 · Sequoia · 2UZ-FE
Supported by vehicle dataToyota bulletin lists P1440 among secondary air codes on 4.7 L engines.
2005–2006 · Tundra · 2UZ-FE
Supported by vehicle dataToyota bulletin lists P1440 among secondary air codes on 4.7 L engines.
2005–2009 · 4Runner · 2UZ-FE
Supported by vehicle dataToyota bulletin lists P1440 among secondary air codes on 4.7 L engines.
2006–2007 · Land Cruiser · 2UZ-FE
Supported by vehicle dataToyota bulletin lists P1440 among secondary air codes on 4.7 L engines.
T-SB-0230-12 RevStatus unverified
Secondary air injection codes on 4.7 L engines
2005–20094runner, land-cruiser, sequoia, tundra · 2UZ-FE · NHTSA 10132097
Debris passing through the air injection pump can contaminate the system and set secondary air codes including P1440 and P1443; the bulletin gives a repair procedure.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
Sources and review
- Toyota bulletin T-SB-0230-12 (Rev): secondary air injection codes on 2UZ-FE 4.7 L engines
- Honda bulletin A20-030: motor power inverter warranty extension, Civic Hybrid
- NHTSA complaint ODI 11485532 (2013 Acura ILX, P1440)
- NHTSA complaint ODI 11534323 (2013 Acura ILX)
- Last reviewed
- 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