Secondary air injection pumps
VEMO offers 66 high-quality secondary air pumps for Audi, BMW, Mercedes-Benz, Ford, Porsche, Toyota, Volkswagen and Volvo.
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Advantages of VEMO secondary air injection pumps
✓ comprehensive range
✓ 100% matching accuracy
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For a safe cold start the ottomotor needs a “rich mixture”. This means that more fuel is injected. As a result, large amounts of carbon monoxide and unburned hydrocarbons are produced during the cold start phase. The lambda control system and the catalytic converter have not reached their operating temperature during this phase yet. Thus, these harmful exhaust gas components can escape into the environment without aftertreatment.
In order to avoid this and to reduce the pollutants during the cold start phase, oxygen-rich ambient air (“secondary air”) is blown directly into the exhaust manifold behind the exhaust valves using the secondary air system. This results in a post-oxidation (“post-combustion”) of the pollutants to harmless carbon dioxide and water. The resulting heat additionally heats the catalyst and shortens the time until the lambda control is started.
Symptoms
- Error code P0410 Malfunction
- Error code P0411 Insufficient quantity
- Noisy secondary air pump
- No secondary air pump operation
Causes of failure
- Defective non-return valve
- Incorrect actuation of the secondary-air valve
- Contamination of the engine air filter
Attention
- Secondary air injection pumps are meant to be used in short-haul operation less than 90 seconds.
Audi A3, A4, A6, A8, Škoda Octavia, VW Golf
| X-Ref: | 06A 959 253 E | V10-63-0057 |
