Reference meaning
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.
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A 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.
Scan worksheet →Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
P0412Secondary Air Injection System Switching Valve "A" Circuit •
Manufacturer communications
6Original wording in English
TOYOTA
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? condition for the following Diagnostic Trouble Codes (DTCs): ? P0412 ? Secondary Air Injection System Switching Valve …
TOYOTA
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" condition for the following Diagnostic Trouble Codes (DTCs): • P0412 - Secondary Air Injection System Switching Valve …
TOYOTA
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
CADILLAC, PONTIAC
ENGINE CRANKS BUT DOES NOT START, NO INJECTOR PULSES, DIAGNOSTIC TROUBLE CODE CODES P0118, P0122, P0335, P0385, P0412, AND/OR P0340 SET. *TT
Check vehicle applicability
30A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Buick | ROADMASTER ↗ | 1996 |
| Buick | ROADMASTER ↗ | 1995 |
| Buick | ROADMASTER ↗ | 1994 |
| Cadillac | DEVILLE ↗ | 2005 |
| Cadillac | DEVILLE ↗ | 2004 |
| Cadillac | FLEETWOOD ↗ | 1996 |
| Cadillac | FLEETWOOD ↗ | 1995 |
| Cadillac | FLEETWOOD ↗ | 1994 |
Code meaning and manufacturer information
Original wording in English · Historical directory labels; manufacturer applicability has not been established for every entry.
Secondary Air Injection System Switching Valve A Circuit Malfunction
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.