Circuit/System Verification
- If DTCs P0411, P0418, P2432 or P2433 are set, perform those diagnostics first.
- With the ignition ON and the engine OFF, observe that the AIR pump is not operating.
- If the AIR pump is operating, test for the following:
- A short to voltage in the AIR pump voltage supply circuit
- A faulty AIR pump relay
- A short to ground in the AIR pump relay control circuit
- A faulty control module