Toyota 89663-47593 Engine Control Calibration
Learn how Toyota calibration 89663-47593 relates to engine control and the P261093 malfunction indicator light condition.
Toyota firmware 89663-47593, listed in service records as calibration ID 896634759300, is an engine control module calibration associated with a malfunction indicator light condition and diagnostic trouble code P261093. The calibration belongs to the software that manages engine operation and monitors engine-related faults.
P261093 concerns the engine control module’s internal engine-off timer performance. That timer helps the controller track how long the engine has been off, information used in certain diagnostic and control decisions. A fault in its reported performance can illuminate the malfunction indicator light even when the driver has not noticed a distinct change in how the vehicle drives.
What the service records say
Toyota service bulletins T-SB-0013-19 and T-TCI-5191 list 896634759300 as an updated calibration for the P261093 malfunction indicator light condition. In that context, the revision addresses the reported diagnostic issue. The records do not describe every software change in the calibration or establish that it changes engine power, fuel economy, or other driving characteristics.
The bulletins cover several Toyota models, including Prius, Prius Prime, Camry, Sienna and Tacoma vehicles across specified model years. That is the scope of the bulletins as a whole, not a fitment list for this individual calibration. The complete calibration ID and the vehicle’s control module information matter when identifying the applicable record.