What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
P0418Secondary Air Injection System Relay "A" Circuit •Manufacturer communications
6Original wording in English
TOYOTA
Reported code forms P0418
Some 2005 ? 2009 model year 4Runner, 2006 ? 2007 model year Land Cruiser, 2005 ? 2007 model year Sequoia, and 2005 ? 2006 model year Tundra vehicles equipped with the 2UZ-FE (4.7 L) engine may exhibit a MIL ?ON?…
TOYOTA
Reported code forms P0418
Some 2012-2013 model year Sequoia and Tundra vehicles equipped with 3UR-FBE engines may exhibit a MIL"ON" condition with DTC P0418 and/or P2445 present. The ECM logic has been modified to reduce the possibility of this…
TOYOTA
Reported code forms P0418
Some 2005 - 2009 model year 4Runner, 2006 - 2007 model year Land Cruiser, 2005 - 2007 model year Sequoia, and 2005 - 2006 model year Tundra vehicles equipped with the 2UZ-FE (4.7 L) engine may exhibit a MIL "ON"…
TOYOTA
Reported code forms P0418
TOYOTA: AIR INJECTION PUMP WITH WATER INTRUSION-MIL ON DTC P0418, P0419, AND/OR P244#. *PE
TOYOTA
Reported code forms P0418
MIL ON CONDITION WITH DIAGNOSTIC TROUBLE CODES (DTC'S) P0412, P0415, P0418, P0419, P2445, OR P2447. THIS CONCERN MAY BE CAUSED BY THE AIR INJECTION CONTROL DRIVER. *NJ
TOYOTA
Reported code forms P0418
MALFUNCTION INDICATOR LAMP ON WITH DTC P0418 AND/OR P2445. *KB
Check vehicle applicability
6A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.