Toyota Prius 2004–2009 — technical service bulletin
Bulletin T-SB-0174-12 Rev · NHTSA communication 10132768 · issued Jun 25, 2014
Technical service bulletin
communication type
Service Brakes, Air
component
2004–2009
model years
6
vehicle entries
Official summary
TSB: Some 2004 ? 2009 model year Prius vehicles may exhibit a MIL ?ON? and brake warning lights (ABS/VSC) illuminated in the instrument panel with Diagnostic Trouble Code (DTC) C1247 (Stroke Sensor Malfunction) stored in the ABS/VSC Electronic Control Unit (ECU). This DTC may set as a result of an overly sensitive monitoring logic without any other ABS/VSC system issue. Follow the Repair Procedure in this bulletin to properly diagnose the system and, if necessary, replace the ABS/VSC ECU with an ECU containing the updated monitoring logic.
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.