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P0138, P0158 HO2S2 EC-1155 < DTC/CIRCUIT DIAGNOSIS > [VQ40DE FOR MEXICO] C D E F G H I J K L M A EC N P O Use this procedure to check the overall function of the heated oxygen sensor 2 circuit. During this check, a 1st trip DTC might not be confirmed. With GST 1. Start engine and warm it up to the normal operating temperature. ground. 8. Check the voltage when revving up to 4,000 rpm under no load at least 10 times. (Depress and release accelerator pedal as soon as possible.) The voltage should be below 0.18V at least once during this procedure. If the voltage can be confirmed in step 6, step 7 is not nec- essary. 9. Keep vehicle at idling for 10 minutes, then check the voltage. Or check the voltage when coasting from 80 km/h (50 MPH) in D position with “OD” OFF. The voltage should be below 0.18V at least once during this procedure. 10. If NG, go to EC-1155, "Diagnosis Procedure" . Diagnosis Procedure INFOID:0000000009481808 PROCEDURE FOR MALFUNCTION A 1. CHECK GROUND CONNECTIONS 1. Turn ignition switch OFF. 2. Loosen and retighten three ground screws on the body. Refer to . OK or NG OK >> GO TO 2. NG >> Repair or replace ground connections. 2. CHECK HO2S2 GROUND CIRCUIT FOR OPEN AND SHORT PBIB1607E BBIA0539E |