Toyota Sienna 2007–2010 — technical service bulletin
Bulletin TCS-11-027 · NHTSA communication 10042935 · issued Oct 18, 2011
Technical service bulletin
communication type
Engine and Engine Cooling
component
2007–2010
model years
7
vehicle entries
Official summary
Toyota: see document search button for owner letter. On some vehicles, due to moisture/water in air injection pumps and/or air switching valves in engines, the check engine light (malfunction indicator light) would illuminate. *pe
Vehicles covered
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.