Toyota 89665-04041 Engine Control Calibration
Learn about Toyota calibration 89665-04041, its engine control role and its connection to Tacoma service bulletins.
Toyota firmware 89665-04041, listed in service records as calibration ID 896650404100, is an engine control calibration associated with the 2016–2018 Toyota Tacoma. It belongs to the engine control module calibration family, which manages engine operation and monitors emissions-related systems.
The engine control module uses sensor information to manage functions such as fuel delivery and ignition timing. Its calibration determines how those control strategies and diagnostic checks operate. The calibration identifier alone does not establish which settings changed in this revision.
Malfunction indicator light and P261093
Toyota service bulletins T-SB-0013-19 and T-TCI-5191 list 896650404100 as an updated calibration in connection with a malfunction indicator light and diagnostic trouble code P261093. That code concerns engine control module internal engine-off timer performance. In practical terms, the documented issue involves a controller self-check that can turn on the warning light.
The bulletins cover several Toyota models and model years. That broad bulletin scope does not mean this specific calibration applies to every vehicle listed. A warning light or P261093 code also needs to be assessed in the context of the vehicle’s actual control module and calibration.
Tacoma service records
T-SB-0062-18 and T-TCI-5133 also identify 896650404100 as an updated calibration within their 2016–2018 Tacoma coverage. Together, those Tacoma-specific records support the vehicle association, while the malfunction indicator light bulletins provide the clearest documented diagnostic context for this calibration.