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2017 PORSCHE 718 BOXSTER S
2.5L Turbo H4•RWD•DCT•gas•MA2.25•turbo
6 active safety recalls on this vehicle — view recalls
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Repairs0Labor476Torque1868Fluid7DTC1856Battery1Maintenance0Recalls6
P0419low severityPowertrain

Secondary Air Injection System Relay B Circuit Malfunction

on 2017 Porsche 718 Boxster S 2.5L Turbo H4 · RWD

What this code means

The PCM detected a fault in the secondary air injection pump relay B circuit. This relay controls power for the air pump during warm-up.

Symptoms

  • Check engine light on
  • Air pump inoperative
  • Failed emissions test

Common causes

  • Faulty relay B
  • Open or shorted wiring
  • Blown fuse
  • Faulty PCM driver

Diagnostic steps

  1. Scan and confirm P0419
  2. Test relay B operation
  3. Inspect wiring and fuse
  4. Check PCM control output
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