DTC P0150 - FRONT LEFT HO2S Nissan Maxima A32

1. Check Input Signal Circuit Turn ignition off. Disconnect front left HO2S harness connector and ECM harness connector. Using an ohmmeter, check continuity as follows: Between ECM harness connector terminal No. 51 and HO2S harness connector terminal No. 2 (White wire). Continuity should exist. Check continuity between ground and ECM harness connector terminal No. 51 or HO2S harness connector terminal No. 2. Continuity not should exist. If continuity is as specified, go to next step. If continuity is not as specified, repair fault in White wire.
2. Clear Self-Learning Data Loosen and retighten engine ground screws. Disconnect MAF sensor harness connector. Start engine and run at least 3 seconds at idle speed. Stop engine and reconnect MAF sensor harness connector. Verify DTC P0100 is displayed. Erase DTC memory and verify DTC P0000 is displayed. Restart engine and run for at least 10 minutes at idle speed. If DTCs P0174 or P0175 are detected or engine is difficult to start, see «DTC P0174 OR P0175 - FUEL INJECTION SYSTEM FUNCTION - LEFT BANK»(ref-17943-S39350785852001121700000) . If no DTCs are detected, go to next step.
3. Check Component Loosen and retighten engine ground screws. Disconnect ECM and HO2S wiring harness connector. Check terminals for damage or corrosion. Repair if necessary and retest system. If fault is still present, replace front left HO2S sensor.

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