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EC-450 [QG (WITH EURO-OBD)] DTC P1146, P1166 HO2S2 (A/T MODELS) 5. Select “FUEL INJECTION” in “ACTIVE TEST” mode, and select 6. Check “HO2S2 (B1)/(B2)” at idle speed when adjusting “FUEL INJECTION” to ± 25%. “HO2S2 (B1)/(B2)” should be above 0.68V at least once when the “FUEL INJECTION” is +25%. − 25%. CAUTION: ● Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 ● Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread Without CONSULT-II 1. Start engine and warm it up to the 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 one minute under no 4. Let engine idle for one minute. 5. Set voltmeter probes between ECM terminal 16 [HO2S2 (B1) signal] or 17 [HO2S2 (B2) signal] and 6. Check the voltage when revving up to 4,000 rpm under no load 7. Keep vehicle at idling for 10 minutes, then check voltage. Or 8. If NG, replace heated oxygen sensor 2. CAUTION: ● Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 SEF662Y SEF244YA MBIB0021E |