Toyota 89665-0C120 Engine Control Calibration

89665-0C120 is a Toyota calibration identifier in the 89665 part-number family, which is associated with engine control computer software. Its association with an engine control module is tentative because the identifier alone does not establish the exact application.

An engine control module uses calibration data to manage engine operation, including fuel delivery and ignition timing, in response to operating conditions. The identifier does not establish which of those behaviors changed in this particular revision or identify a specific vehicle fitment.