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DTC P0131, P0151 A/F SENSOR 1 EC-225 < SERVICE INFORMATION > [VQ35DE] C D E F G H I J K L M A EC N P O : Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.) Diagnosis Procedure INFOID:0000000001326058 1. CHECK GROUND CONNECTIONS 1. Turn ignition switch OFF. 2. Loosen and retighten ground screw on the body. Refer to OK or NG OK >> GO TO 2. NG >> Repair or replace ground connections. 2. CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY CIRCUIT 1. Disconnect air fuel ratio (A/F) sensor 1 harness connector. 2. Turn ignition switch ON. TERMI- NAL NO. WIRE COLOR ITEM CONDITION DATA (DC Voltage) 24 L A/F sensor 1 heater [Engine is running] Approximately 5V 57 G A/F sensor 1 (bank 2) [Engine is running] Approximately 2.6V 58 Y Approximately 2.3V 76 P Approximately 3.1V 77 BR Approximately 2.3V PBIB1584E PBIB2625E PBIB2190E |