Toyota Prius 2010–2012 — technical service bulletin
Bulletin ZF3_Toyota POL16 · NHTSA communication 10164926 · issued Aug 30, 2019
Technical service bulletin
communication type
Engine and Engine Cooling
component
2010–2012
model years
7
vehicle entries
Official summary
Warranty Enhancement Program: Toyota has received reports of a rough idle and/or rattle noise from the transaxle at cold start due to a sticking Exhaust Gas Recirculation (EGR) Valve in some vehicles. If this occurs, the vehicle may illuminate the check engine light and set diagnostic trouble code (DTC) P0401.
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.