Universal (All Makes) Vehicle (OBD-II)
Severity:Common Causes
- map[cause:Failed secondary air injection pressure sensor]
- map[cause:Clogged secondary air injection passages from carbon buildup]
- map[cause:Failed secondary air injection pump not producing air flow]
- map[cause:Cracked or disconnected air injection hose losing pressure]
- map[cause:Damaged wiring to the pressure sensor]
How to Fix It
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Check for companion codes — P0410, P0411 help narrow down the exact fault.
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Inspect SAI hoses and connections for cracks or disconnections.
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Listen for the SAI pump running during cold start — if silent, the pump may have failed.
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Test the pressure sensor wiring and connector for damage.
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Replace the pressure sensor or SAI pump based on testing results.
Frequently Asked Questions
What does the secondary air injection system do?
It injects fresh air into the exhaust during cold starts. This burns off unburned hydrocarbons quickly and warms the catalytic converter faster. It only runs for the first minute or two after a cold start.
Can I drive with P2430?
Yes, but cold-start emissions will be higher than normal. You will fail an emissions test. Fix it at your next opportunity.
How long do secondary air pumps last?
Most last 80,000–120,000 miles. Water intrusion is a common killer — many pumps fail when water is sucked in during puddle driving.