Home >> Mazda >> 2024 >> CX-90 Turbo Select >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> On-Board Diagnostic - Pcm (VIN C & VIN D) (4 Of 5) >> DTC P2251-00: A/F Sensor System: Open Circuit In A/F Sensor Signal Circuit >> PID Item/Simulation Item Used In Diagnosis >> PID/DATA monitor item