P2444
Secondary Air Injection Pump Stuck On (Bank 1)
OBD-II
Emissions
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P0410
Secondary Air Injection System
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P0411
Secondary Air Injection System Incorrect Flow Detected
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P0412
Secondary Air Injection System Switching Valve A Circuit
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P2000
NOx Trap Efficiency Below Threshold (Bank 1)
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P2001
NOx Trap Efficiency Below Threshold (Bank 2)
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P2002
Diesel Particulate Filter Efficiency Below Threshold (Bank 1)
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P2003
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P2031
Exhaust Gas Temperature Sensor Circuit (Bank 1 Sensor 2)
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General reference only — what a code means can vary by make and model. Confirm with a qualified technician.