Toyota 89663-47681 Engine Control Calibration
Learn how Toyota calibration 89663-47681 relates to engine control and the P261093 malfunction indicator light condition.
Toyota 89663-47681 is an engine control calibration identified in Toyota service records by the full calibration ID 896634768100. It is listed as an updated calibration for a malfunction indicator light condition involving diagnostic trouble code P261093.
The engine control module uses its calibration to manage engine operation and monitor emissions-related systems. On a hybrid vehicle, it also works with the hybrid control system when the gasoline engine needs to start, run or stop. The calibration’s presence in a service bulletin does not mean it changes all of those functions.
What the P261093 bulletin addresses
Toyota service bulletins T-SB-0013-19 and T-TCI-5191 list 896634768100 as an updated calibration for the reported warning-light condition. P261093 concerns the engine control module’s internal engine-off timer performance. In practical terms, the condition can cause the malfunction indicator light, commonly called the check-engine light, to illuminate when the control module detects a problem with that timing function.
The bulletins identify this calibration as part of the revision addressing that condition. They do not establish that every check-engine light or every occurrence of P261093 has the same cause.
Vehicle application and calibration ID
The bulletin scope includes several Toyota models and model years, including Prius, Prius Prime, Camry, Camry Hybrid, Sienna and, in T-SB-0013-19, Tacoma. That is the combined scope of each bulletin, not a fitment list for 896634768100 specifically.
The full calibration ID matters when distinguishing this entry from other engine-control software covered by the same bulletins. A vehicle’s existing calibration and applicable service information are needed to establish whether this particular revision applies.