Code result
P2441
Secondary Air Injection System Switching Valve Stuck Closed
Moderate severity
What it means
The switching valve on bank 1 will not open when commanded, so no secondary air reaches the exhaust during cold start. Catalyst light-off is delayed and emissions during the cold-start window rise.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Switching valve stuck closed by carbon
highOne of the most commonly reported causes for this code — check this first.
Vacuum control line leak
mediumA plausible cause — test and verify before replacing parts.
Carbon or debris buildup preventing free movement
lowLess common, but worth ruling out after the more likely causes.
Related help
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