Toyota Sequoia 2012–2013 — technical service bulletin
Bulletin TSB-0033-12 · NHTSA communication 10047959 · issued Feb 3, 2012
Technical service bulletin
communication type
Engine
component
2012–2013
model years
4
vehicle entries
Official summary
Toyota: under freezing ambient conditions, some vehicles engine may experience mil on. To address issue, engine control module (ecm) was revised. Model 2012-2013 sequoia, tundra. *pe
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.