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DTC P1146, P1166 HO2S2 EC-1611 [VG33ER] C D E F G H I J K L M A EC Overall Function Check UBS00E08 Use this procedure to check the overall function of the heated oxygen sensor 2 circuit. During this check, a CAUTION: Always drive vehicle at a safe speed. WITH GST 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 1 minute under no load. 4. Let engine idle for 1 minute. 5. Set voltmeter probes between ECM terminal 56 [HO2S2 (B1) signal] or 57 [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 the voltage. Or 8. If NG, go to EC-1615, "Diagnostic Procedure" SEF922UA |