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 communications
11Original wording in English
AUDI
Reported code forms P049100
Summary of all Vin-4-Pin topics for June Check engine light after charging - P0E5E00 Rattle noise from sound generator Vehicle sound malfunction warning Oil leak from oil filter drain off valve Secondary air codes…
ASTON MARTIN
Reported code forms P0491
V12 Secondary air injection codes P0492 P0491
AUDI
Reported code forms P049100
This bulletin contains diagnosis and repair information for DTC P049100 and P049200.
VOLKSWAGEN
Reported code forms P0491
Technical Bulletin (Update Programming, DTCs P0491 and or P2440 stored in the ECM Fault Memory): Current ECM software are causing erroneous faults. This document contains the codes necessary to update the software to…
AUDI
Reported code forms P0491
The MIL is on due to DTCs P0491 and P0492 being stored in the ECM.
AUDI
Reported code forms P0491
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…
Check vehicle applicability
69A 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 | A3 | 2026 |
| Audi | A4 | 2011 |
| Audi | A4 | 2010 |
| Audi | A4 | 2009 |
| Audi | A4 AVANT | 2011 |
| Audi | A5 | 2026 |
| Audi | A6 | 2011 |
| Audi | A6 | 2010 |
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.