Air Injection: Testing and Inspection

During the AIR system diagnostic (DTC P0410), the PCM will use the oxygen sensor 1 (O2S-1) to verify the AIR system is working. When the PCM commands the AIR system to run, the O2S-1 signal should indicate a lean condition due to outside air being pumped into the exhaust manifold. If the PCM does not detect a certain lean O2S-1 signal after a series of tests, DTC P0410 will set.

IMPORTANT: If a low or high voltage fault exists in the air pump relay or air pump solenoid circuit, the PCM will still run the P0410 diagnostic. The PCM will only illuminate the Malfunction Indicator Lamp (MIL) because the P0410 diagnostic failed on the second consecutive trip.