This code indicates that the powertrain control module (PCM) has detected a high voltage signal from the secondary air injection (AIR) system air flow/pressure sensor.
Possible causes:
- AIR flow/pressure sensor is faulty
- Wiring to the AIR flow/pressure sensor is open or shorted
- PCM is faulty
Diagnostic tips:
- Inspect the AIR flow/pressure sensor for damage or contamination.
- Check the wiring to the AIR flow/pressure sensor for continuity and voltage drop.
- Check the PCM for voltage signals on the sensor wiring using a scan tool.
