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Home >> Nissan-Datsun >> 2021 >> Qashqai SL >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (4 Of 4) >> Engine (ECM) >> DTC P2251: O2 Sensor 1 Bank 1 >> DTC Description >> Notes

DTC Description: Notes

To judge malfunctions, the diagnosis checks that the A/F signal computed by ECM from the A/F sensor 1 signal fluctuates according to fuel feedback control.