Split Air #2 Circuit Malfunction
The secondary air injection system isn't working properly on bank 2 of your engine. Think of it like a backup air pump that helps reduce emissions—if it fails, the system can't clean up exhaust gases effectively.
The ECU monitors the secondary air injection (SAI) pump circuit for bank 2, checking for proper voltage and current flow during cold-start conditions. It verifies that the solenoid valve opens and the pump delivers air to the exhaust manifold to oxidize unburned hydrocarbons. A fault occurs when the ECU detects an open circuit, short, or inability to achieve expected resistance/amperage.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| SAI Solenoid Voltage | 12V when activated | Below 10V or no voltage detected |
| SAI Pump Current Draw | 2-5 amps during operation | 0 amps or excessive current (short circuit) |
Code P1424 is a moderate fault. You can generally drive to a workshop, but avoid long trips or high-load driving (motorway, uphill towing) until it is diagnosed. If the code keeps returning after clearing, or if you notice the symptoms listed above worsening, do not delay professional diagnosis. Many moderate codes have multiple possible root causes — a mechanic with live OBD data can identify the exact fault more efficiently than part-by-part trial and error.
Once the fault is repaired, P1424 can be cleared using any OBD-II scanner. Connect the scanner, navigate to "Clear Codes" or "Erase DTCs," and confirm. The check engine light turns off immediately.
The code will return if the root cause was not actually fixed. The ECM re-detects the fault within 1–3 drive cycles and sets the code again.