FixVault

Home › Nissan-Datsun › 2021 › Sentra S › Repair and Diagnosis › Engine Performance › System › Engine Control System (DTC/Circuit Diagnosis) (4 Of 4) › DTC/Circuit Diagnosis › DTC P2239: O2 Sensor 1 Bank 1 › DTC Description › Possible Cause

Possible Cause

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