The Check Engine Light may illuminate because a component of the oxygen sensor stops working. As a result the engine computer is unable to determine the proper ratio of air to fuel for the engine. Replacing the failed oxygen sensor should correct this concern.
The average cost for a Toyota Highlander Oxygen Sensor Replacement repair is between $714 and $830.
The average cost for a Toyota Highlander Check Engine Light Diagnosis & Testing repair is between $122 and $179.
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