What this code means

The ECU detected an electrical short in the secondary air injection system circuit. The system is unable to operate correctly, preventing proper cold-start emission reduction.

Symptoms

• Check Engine Light
• Higher cold-start emissions
• Failed emissions test
• Unusual noise from air pump

Common causes

• Shorted wiring in secondary air circuit
• Faulty secondary air pump motor
• Relay contact welded closed
• Damaged connector
• Water intrusion in air pump

Diagnostic steps

1. Test secondary air pump motor resistance
2. Check circuit for shorts
3. Test relay operation
4. Inspect connector and wiring
5. Check for water entry in pump

Repair notes

Repair the electrical short or replace the secondary air pump.

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