Secondary Air Injection Pump Stuck On Bank 2
The P2446 code indicates that the secondary air injection (SAI) system pump is stuck on for Bank 2. This system reduces cold-start emissions by injecting fresh air into the exhaust. When the pump remains on, it can cause excessive noise, drain the battery, and potentially damage the pump or relay. Common causes include a stuck relay, shorted wiring, or a failed pump control module.
01. Most Common Causes
- Stuck secondary air injection pump relay
- Shorted or damaged wiring to the pump
- Failed pump control module or ECM
- Pump motor seized in the on position
02. Symptoms You Will Notice
- Engine running rough or stalling
- Loud whining noise from the pump area
- Check Engine Light illuminated
- Battery draining quickly
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to confirm P2446 and check for related codes.
Step 2: Inspect the SAI pump relay and wiring for shorts or damage.
Step 3: Test the pump operation by commanding it on/off with a scan tool.
Step 4: Check for voltage at the pump connector with the key off to identify a stuck relay.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended as the pump may run continuously, draining the battery and potentially causing a fire or pump failure.
How much does it cost to fix?▼
Typically $50-$150 for a relay or wiring repair; pump replacement can cost $200-$500.