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P0131, P0151 A/F SENSOR 1 EC-681 < DTC/CIRCUIT DIAGNOSIS > [VK56DE] C D E F G H I J K L M A EC N P O 6. Turn ignition switch OFF and wait at least 10 seconds. 7. Restart engine. 8. Drive and accelerate vehicle to more than 40 km/h (25 MPH) within 20 seconds after restarting engine. 9. Maintain the following conditions for approximately 20 consecutive seconds. NOTE: • Keep the accelerator pedal as steady as possible during cruising. • If this procedure is not completed within 1 minute after restarting engine at step 7, return to step 4. 10. Check 1st trip DTC. 11. If 1st trip DTC is displayed, go to WITH GST Follow the procedure “WITH CONSULT” above. Diagnosis Procedure INFOID:0000000007358554 1. CHECK GROUND CONNECTIONS 1. Turn ignition switch OFF. 2. Loosen and retighten ground screws on the body. OK or NG OK >> GO TO 2. NG >> Repair or replace ground connections. 2. CHECK AIR FUEL RATIO SENSOR 1 POWER SUPPLY CIRCUIT 1. Disconnect air fuel ratio (A/F) sensor 1 harness connector. 2. Turn ignition switch ON. ENG SPEED 1,000 - 3,200 rpm VHCL SPEED SE More than 40 km/h (25 MPH) B/FUEL SCHDL 1.5 - 9.0 msec Selector lever Suitable position BBIA0539E 1. A/F sensor 1 (bank 2) harness connector 2. A/F sensor 1 (bank 2) 3. A/F sensor 1 (bank 1) 4. A/F sensor 1 (bank 1) harness connector ALBIA0360ZZ August 2012 2012 Pathfinder |