AIR System Switching Valve Stuck Closed Bank 2

Where it lives

For P2443, the part to look at first is the switch named here. The description of P2443 puts it on bank 2.

Check these first

• A bank 2 AIR switching valve stuck closed
• Carbon or debris locking the bank 2 valve shut
• A failed bank 2 AIR valve solenoid
• A blocked bank 2 AIR supply hose

What to do next

1. Command the bank 2 AIR switching valve open and watch air flow
2. Inspect the bank 2 valve for carbon or debris
3. Check the bank 2 valve control circuit for an open
4. Inspect the bank 2 AIR hose for blockage
5. Replace the bank 2 AIR switching valve if it will not open
6. Clear the code and retest

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