Code result

P0410

Secondary Air Injection System Malfunction

Moderate severity

What it means

A general fault in the secondary air injection system. The system pumps fresh air into the exhaust during cold start to accelerate catalyst light-off; common faults are a seized pump, blocked passages or a stuck valve.

Is it safe to drive?

Use caution

The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.

Most likely causes

  • Air pump seized (water ingress is a common cause)

    high

    One of the most commonly reported causes for this code — check this first.

  • Combi valve stuck

    medium

    A plausible cause — test and verify before replacing parts.

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