P2447 — Secondary air pump on bank 2 not running
The secondary air injection pump on the engine's bank 2 is not operating when it should. This system helps reduce emissions by injecting air into the exhaust to burn off excess pollutants during cold starts. The code appears because the pump is stuck off, which can be due to electrical or mechanical issues preventing it from running.
Common causes
The cause is almost always one of a few things. Here they are — P2447 rarely comes from anything outside this list:
- Faulty or failed secondary air injection pump
- Blown fuse or bad relay for the pump
- Wiring issues or connector corrosion
- Clogged or stuck air injection check valve
- Faulty control module or sensor
Where to start
In the order a sensible mechanic would work — the cheap checks first, the expensive replacements only after:
- Check and replace blown fuses or relays
- Inspect and repair wiring and connectors
- Test and replace faulty secondary air pump
- Clean or replace air injection check valve
- Scan and update or replace control module if needed
That is what holds for P2447 in general. From here it depends on your engine — tell me which car it is and what it does, and I will give you the steps for it: real procedures, torque figures and diagrams instead of general advice.
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Above is what the code means and why it appears. TorqFix goes further — it gives you specific procedures, torque values, wiring diagrams and pinouts for your exact engine, not generic steps for every car. Real workshop data (127,000+ diagrams, 10,000+ procedures), interpreted by AI in your language.
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Code breakdown
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Who makes these pages, and how
TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
The same code can mean different things on different makes. Match the meaning to your make before acting on it.
Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com
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