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P0137 HO2S2 EC-885 < DTC/CIRCUIT DIAGNOSIS > [MR EXCEPT FOR NISMO RS MODELS] C D E F G H I J K L M A EC N P O “HO2S2 (B1)” should be above 0.72 V at least once when the “FUEL INJECTION” is + 25%. “HO2S2 (B1)” should be below 0.28 V at least once when the “FUEL INJECTION” is − 25%. Is the inspection result normal? YES >> INSPECTION END NO >> GO TO 6. 3. CHECK HEATED OXYGEN SENSOR 2-I Without CONSULT 1. Start engine and warm it up to normal operating temperature. 2. Turn ignition switch OFF and wait at least 10 seconds. 3. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load. 4. Let engine idle for 1 minute. 5. Check the voltage between ECM harness connector and ground as per the following condition. Is the inspection result normal? YES >> INSPECTION END NO >> GO TO 4. 4. CHECK HEATED OXYGEN SENSOR 2-II Check the voltage between ECM harness connector and ground as per the following condition. Is the inspection result normal? YES >> INSPECTION END NO >> GO TO 5. 5. CHECK HEATED OXYGEN SENSOR 2-III Check the voltage between ECM harness connector and ground as per the following condition. Is the inspection result normal? YES >> INSPECTION END : The voltage should be above 0.72 V at least on time. : The voltage should be below 0.28 V at least on time. ECM Condition Voltage Connector + − Terminal F24 84 78 Revving up to 4,000 rpm under no The voltage should be above 0.72 V ECM Condition Voltage Connector + − Terminal F24 84 78 Keeping engine speed at idle for 10 The voltage should be above 0.72 V ECM Condition Voltage Connector + − Terminal F24 84 78 Coasting from 80 km/h (50 MPH) in The voltage should be above 0.72 V |