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Home >> Toyota >> 1994 >> 4Runner 2.4 R, W56 >> Repair and Diagnosis >> Engine Performance >> Sensor Range Charts >> Engine Controls - Sensor Operating Range Charts >> Sensor Operating Specifications >> Sub-Oxygen Sensor Heater
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Sub-Oxygen Sensor Heater

NOTE: Sub-oxygen sensor heater may be used only on California applications on some models. See OXYGEN SENSOR APPLICATION  table.
OXYGEN SENSOR APPLICATION

Application Type Main Oxygen Sensor Sub-Oxygen Sensor Sensor Heater
4Runner X (1) X (2) X
(1) Applies to California models.
(2) Heater used on main oxygen sensor on all models. Heater used on sub-oxygen sensors on California models.
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