P1421

P1421 OBD Code Definition:
P1421 Secondary Air System Bank 1
P1421 OBD Code Description:

Possible Causes

  • Secondary Air Injection Solenoid Valve faulty
  • Secondary Air Pump Relay faulty

Possible Solutions

  • Check Secondary Air Injection Solenoid Valve
  • Check Secondary Air Pump Relay

 

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