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Home >> Infiniti >> 2020 >> QX50 Essential, FWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTC/Circuit Diagnosis) (7 Of 12) >> DTC/Circuit Diagnosis >> DTC P1148: Closed Loop Control >> DTC Description >> Possible Cause

Possible Cause

Harness or connectors (A/F sensor 1 circuit is open or shorted.)
A/F sensor 1
A/F sensor 1 heater

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