P2447Secondary Air Injection

Secondary Air Injection System Pump Stuck Off (Bank 2)

The control module has determined that the secondary air injection pump on bank 2 is not turning on when commanded, or is stuck off. Without the pump, the exhaust does not receive the extra air needed to warm the catalyst quickly at cold start.

🚗 Yes, in most cases. This emissions fault mainly affects cold-start emissions. Repair it to pass emissions testing.

MEDIUM

severity

🎯 Top Causes, Ranked by Likelihood

#1Faulty secondary air pump$200-$500

35%

The pump motor has failed and no longer runs.

#2Faulty pump relay$40-$150

25%

The relay does not close to power the pump.

#3Open in pump power or ground$80-$250

25%

A broken supply or ground wire leaves the pump without power.

#4PCM control fault$200-$600

15%

The module fails to command the pump on.

🩺 Common Symptoms

Check engine light is on
No air pump sound at cold start
Higher cold-start emissions
Air injection monitor does not complete

💰 Repair Cost: DIY vs Shop

DIY Cost

$40-$500

Shop Cost

$150-$650

📋 Free OBD2 Code Cheat Sheet

The 50 most common codes with likely cause and DIY fix cost. Sent once, no spam.

🔧 How to Diagnose P2447

1Command the pump on with a scan tool and listen for operation.

2Test the pump relay and its power and ground circuits.

3Apply power directly to the pump to confirm it runs.

4Replace the relay, wiring, or pump as indicated, then clear and retest.

❓ Frequently Asked Questions

How does this differ from P2445?

It is the same stuck-off fault on bank 2 rather than bank 1. Diagnosis and repair are the same.

Can I drive with it?

Yes, in most cases. It mainly affects cold-start emissions.

How do I test the pump directly?

Apply battery power and ground to the pump motor to see if it runs, which isolates it from the wiring.

🔗 Related Codes

P2445P2446P2443P0410P0418