Montero LS 4WD V6-2972cc 3.0L SOHC 24 Valve (1996)
theoretical air/fuel mixture ratio.
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Battery positive voltage is supplied, by way of the MFI relay, to the heated oxygen sensor heater. As a result, the sensor element is heated by
the heater, so that the heated oxygen sensor shows excellent response even if the temperature of the exhaust gas is low.