What Does P2446 Mean?
The engine control module has detected that the secondary air injection pump on Bank 2 remains energized when it should be off. This prevents proper control of the emissions system during cold start conditions.
Common Causes
35%
Faulty secondary air injection pump relay stuck closed
30%
Shorted wiring or connector to air pump
20%
Failed engine control module (ECM) output driver
15%
Defective secondary air injection pump with internal short
Diagnostic Steps
1
Step 1: Monitor secondary air pump command vs actual state using scan tool active tests
2
Step 2: Check voltage at pump connector with key on, engine off - should be 0V
3
Step 3: Inspect relay operation by manually actuating and listening for click
4
Step 4: Test wiring between relay and pump for short to power
5
Step 5: Verify ECM ground circuits and test relay control circuit for shorts
Estimated Repair Cost
$150 - $800
Parts + labor, varies by vehicle and location
The engine control module has detected that the secondary air injection pump on Bank 2 remains energized when it should be off. This prevents proper control of the emissions system during cold start conditions.
The most common cause of P2446 (Secondary Air Injection System Pump Stuck On Bank 2) is: Faulty secondary air injection pump relay stuck closed
Typical repair costs for P2446 range from $150 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive but may cause increased emissions and potential catalytic converter damage over time if left unrepaired.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2446 to identify the root cause.
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Quick Info
Category
Powertrain
System
Emissions Control System
Difficulty
Type
Generic (SAE)
Recommended Tools
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