P0421 Volkswagen
Warm Up Catalyst Efficiency Below Threshold Bank 1
Volkswagen
P0418 Volkswagen
Secondary Air Injection System Relay ‘A’ Circuit Malfunction
P0420 Volkswagen
Catalyst System Efficiency Below Threshold Bank 1
P0416 Volkswagen
Secondary Air Injection System Switching Valve ‘B’ Circuit Open
P0417 Volkswagen
Secondary Air Injection System Switching Valve ‘B’ Circuit Shorted
P0414 Volkswagen
Secondary Air Injection System Switching Valve ‘A’ Circuit Shorted
P0412 Volkswagen
Secondary Air Injection System Switching Valve ‘A’ Circuit Malfunction
P0413 Volkswagen
Secondary Air Injection System Switching Valve ‘A’ Circuit Open
P0410 Volkswagen
Secondary Air Injection System-Pump Relay Fault
P0411 Volkswagen
Secondary Air Injection System Incorrect Flow Detected