P2444Generic code

P2444 Code: Secondary Air Injection System Pump Stuck On (Bank 1)

The P2444 code means the secondary air pump is still running when the computer has already commanded it off. A relay with welded contacts is the usual cause. A pump that runs too long can overheat and burn out.

Severity
Low
Can I keep driving?
Yes, no immediate risk
Estimated cost
$80 to $800
Difficulty
Medium
System
Emissions Control
Applies to
All OBD2 vehicles

Updated Reviewed by Renzo Chacca

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What the P2444 code means

The secondary air system injects fresh air into the exhaust during the first minutes after a cold start. That burns off leftover hydrocarbons and warms the catalytic converter sooner. It is made up of an electric pump, a relay, a switching valve and a check valve next to the exhaust manifold.

A pump that does not shut off usually has a stuck relay. If it runs for a long time it overheats and burns out. That is what the P2444 code is warning about.

The system works only for a minute or two after a cold start, so tests should be done with the engine cold.

P2444 code symptoms

  • Check engine light on.
  • The pump noise after a cold start is either present or missing.
  • Usually no driving symptoms.
  • May keep you from passing an emissions inspection.

Likely causes of the P2444 code

  1. Pump relay with welded contacts. The most frequent cause.
  2. Control wire shorted to ground. Look for rubbing against the engine, the chassis or the exhaust.
  3. Computer. Uncommon.

How to diagnose the P2444 code step by step

  1. Start the engine cold and listen. The pump should run for a few seconds or minutes.
  2. Command the pump and the valve with the scan tool.
  3. Check the hoses between the pump and the manifold.
  4. Check the check valve. It should let air through only toward the exhaust.
  5. Watch the oxygen sensors with secondary air active. They should show a lean mixture.

How to fix the P2444 code

  • Replace the faulty valve or pump.
  • Clean or replace clogged passages.
  • Replace the relay if it does not switch the pump on.
  • Clear the codes and verify with a cold start.

Technical reference data

  • Secondary air pump: 12 V and a draw of 10 to 30 A.
  • Typically runs for 30 to 120 seconds after a cold start.
  • Approximate values only: check the manufacturer data for your vehicle.

Brand-specific notes

If the pump keeps running, pull the relay first. If the noise stops, the relay is your answer, and the pump may still be fine. Check valves are damaged when condensation gets into the pump.

P2444 on Volkswagen, Audi, BMW, Mercedes-Benz and Porsche

Common on these European makes.

P2444 on Toyota Tundra and Sequoia

Seen on these Toyota models.

P2444 on Chevrolet

Seen on Chevrolet vehicles as well.

Frequently asked questions about P2444

Can I drive with a P2444 code?
Yes. The P2444 code does not affect how the car drives, but a pump that never stops can burn out, so fix it soon.
What does secondary air injection do?
It helps warm up the catalytic converter and cut emissions right after a cold start.
Why does the air pump fail?
Because water or condensation gets in from the exhaust when the check valve fails.
What does the P2444 code mean?
It means the secondary air pump on bank 1 is stuck on and keeps running after the computer commanded it off.
How much does it cost to fix P2444?
Roughly $80 to $800. A relay is at the low end, and a new air pump costs the most.

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Questions about the P2444 code

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