Secondary Air Injection System Switching Valve A Circuit Open
What does P0413 mean?
The P0413 code means the vehicle's onboard diagnostic system has detected: Secondary Air Injection System Switching Valve A Circuit Open. This is a low severity code.
Common Symptoms
- Check Engine Light illuminated
- No drivability issues during normal operation
- Secondary air system does not activate on cold start
- Failed emissions test
Probable Causes (Ranked by Likelihood)
- Open circuit in switching valve wiring harness Very High
- Disconnected or damaged switching valve connector High
- Failed switching valve solenoid (open coil) Moderate
- Blown fuse in secondary air circuit Moderate
Step-by-Step Diagnostic Procedure
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Check the switching valve connector for disconnection or damage
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Measure solenoid resistance -- an open reading (OL) confirms a burned-out coil
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Check for continuity in the wiring from the ECM to the switching valve
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Verify the secondary air system fuse is intact
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Apply 12V to the solenoid to test -- no click indicates an open coil
Frequently Asked Questions
Can I drive with code P0413?
Yes. This code only affects the secondary air injection system which operates during cold starts. Normal driving is unaffected, but the code will cause an emissions test failure.
What does circuit open mean for P0413?
Circuit open means there is a break in the electrical path -- either a disconnected connector, a broken wire, or a burned-out solenoid coil that no longer conducts electricity.
Can a blown fuse cause P0413?
Yes. A blown fuse in the secondary air system circuit will prevent power from reaching the switching valve solenoid, which the ECM detects as an open circuit.