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.
Narrow by vehicle
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.
P0492Secondary Air System Insufficient Flow, Bank 1/2
Manufacturer communications
9Original wording in English
ASTON MARTIN
V12 Secondary air injection codes P0492 P0491
AUDI
This bulletin contains diagnosis and repair information for DTC P049100 and P049200.
AUDI
The MIL is on due to DTCs P0491 and P0492 being stored in the ECM.
AUDI
MIL on. DTC P0491 and P0492 (Secondary Air System Insufficient Flow, Bank 1/2) are stored at the same time. Mileage is greater than 15,000 miles. Under certain driving conditions, the secondary air ports in the cylinder head can accumulate carbon over time, causing a restriction.
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 |
|---|---|---|
| Aston Martin | DB11 ↗ | 2019 |
| Aston Martin | DB11 ↗ | 2018 |
| Aston Martin | DB11 ↗ | 2017 |
| Aston Martin | DBS SUPERLEGGERA ↗ | 2019 |
| Audi | A4 ↗ | 2011 |
| Audi | A4 ↗ | 2010 |
| Audi | A4 ↗ | 2009 |
| Audi | A4 AVANT ↗ | 2011 |
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.