P2430
PowertrainSecondary Airlow severitySecondary Air Injection System Air Flow/Pressure Sensor Circuit Low Bank 1
What P2430 Means
The secondary air injection system air flow or pressure sensor is reading a signal that is too low on Bank 1. This affects the system that pumps air into the exhaust to reduce cold-start emissions.
Symptoms
- Check engine light on
- Failed emissions test
- Rough running at cold start
Common Causes
- Faulty secondary air pressure sensor
- Wiring or connector fault at sensor
- Blocked or leaking air hose
- Faulty secondary air pump
Diagnostic Steps
- Check for stored codes and freeze frame data
- Inspect secondary air sensor wiring and connector
- Test sensor signal voltage with scan tool
- Inspect air hoses and pump operation
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Any of these will read and clear this code — pick by how deep you want to go.
Budget handheld~$40
ANCEL AD410 →
No-phone-needed handheld — reads, clears, live data, freeze frame.
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Serious DIY~$100
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Autel MaxiCOM MK808S →
Bidirectional tests, service resets, all systems.
✓ Autel official store
Pro diagnostics$1,500+
Autel MaxiSys MS906 Pro →
Full-system pro platform — topology mapping, ECU coding, the works.
✓ Autel official store
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