Trouble codes › P0410

P0410 Secondary Air Injection System "A"

Emissions

P0410 means the secondary air injection system (an air pump used right after cold starts) isn't working.

Some engines pump fresh air into the exhaust for the first minute after a cold start to heat up the catalytic converter. P0410 means that system isn't working as expected.

Can I keep driving? Yes, for now.

Safe to drive. It only affects emissions right after cold starts, but it will fail an emissions inspection.

Common causes

  1. A failed air pump (often from water getting in)
  2. A failed air pump relay or fuse
  3. A stuck check valve or combination valve
  4. A cracked or disconnected hose
  5. Carbon-clogged air passages in the cylinder head (some engines)

Symptoms

  • Check-engine light
  • A loud whine or no sound from the air pump after cold starts

What to check first

  1. Listen for the air pump running for about a minute after a cold start.
  2. Check the pump's fuse and relay.
  3. Inspect the hoses and check valve for moisture and damage.
  4. Check for service bulletins: some vehicles have known pump and valve problems.

What does P0410 mean on your vehicle?

The likely cause depends on your engine. iRepair researches your exact year, make, model and engine (service bulletins, recalls and owner reports) and tells you what to check first. Your first 3 questions are free.

Ask iRepair about P0410

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Related codes

General guidance for P0410 on most vehicles. Some makers use the same code a little differently; confirm in the service information for your vehicle, put safety first, and see a professional when in doubt.