P1439 – Secondary Air Injection Pump Fault (Nissan)

Description

The ECM detected a malfunction in the secondary air injection pump.

Want to confirm the real cause of this fault code?

A high-quality OBD2 scanner gives you live data, fuel trims, sensor readings and freeze-frame information — exactly what you need to verify the root cause of this code with confidence.

View Recommended Scanners

Symptoms

  • High emissions
  • Poor drivability

Causes

  • Pump failure
  • Wiring issue
  • Relay fault

Diagnosis

  • Check pump voltage
  • Inspect wiring
  • Test relay

Repair

  • Replace pump
  • Repair wiring