Front Heated Oxygen Sensor Heater (Left Bank)

SYSTEM DESCRIPTION
The ECM performs ON/OFF control of the front heated oxygen sensor heaters corresponding to the engine speed.

OPERATION
Engine Speed rpm / Front heated oxygen sensor heaters
Above 3,600 (A/T models) or 4,000 (M/T models) / OFF
Below 3,600 (A/T models) or 4,000 (M/T models) / ON