Secondary Air Injection Pump Stuck On (Bank 1)
The P2444 code indicates that the secondary air injection (SAI) system pump is running continuously or stuck on for Bank 1. The SAI system pumps fresh air into the exhaust to help the catalytic converter reach operating temperature quickly during cold starts. When the pump is stuck on, it can cause excessive noise, drain the battery, and potentially damage the pump or other components. This issue is often caused by a faulty pump relay, a stuck pump motor, or a short circuit in the wiring.
01. Most Common Causes
- Faulty secondary air injection pump relay (stuck closed)
- Short circuit in pump wiring or connector
- Failed pump motor (internal short causing continuous operation)
- Engine control module (ECM) malfunction (rare)
02. Symptoms You Will Notice
- Loud humming or whining noise from the pump area (even after engine is warm)
- Check Engine Light illuminated
- Battery drain if pump runs continuously with engine off
- Possible reduced fuel economy
03. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm code P2444 and check for related codes (e.g., P2440-P2443).
Step 2: Listen for the pump running with the engine off. If it runs continuously, locate the SAI pump relay and remove it to stop the pump.
Step 3: Test the relay for stuck contacts using a multimeter. Replace if faulty.
Step 4: Inspect the pump wiring and connector for shorts or damage. Repair as needed.
Step 5: If relay and wiring are good, test the pump motor resistance. A shorted motor may need replacement.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive with this code, as the pump may run continuously, draining the battery and potentially causing a fire or pump damage. Have it diagnosed and repaired promptly.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for a relay replacement or wiring repair. If the pump itself needs replacement, parts and labor can be $200-$400 or more.