A small internal brake fluid leak inside the brake booster assembly may be causing the brake, ABS and/or TRAC warning lights to illuminate on some 2011-2015 Toyota Prius and 2012-2015 Prius Plug-in Hybrid vehicles.
Some 2011-2015 Toyota Prius and 2012-2015 Prius Plug-in Hybrid vehicles may exhibit a condition where the brake, ABS and/or TRAC warning lights are illuminated and/or a Check VSC message displays.
DTCs C1391, C1252, C1256 and C1253 may be stored. This condition may be caused by a small internal brake fluid leak inside the brake booster assembly. If any of these DTCs are stored, remove and replace the brake booster assembly with master cylinder. Note that replacement booster/master assemblies are enhanced versions that feature a different part number than original.
MODEL YEAR PRIUS
PREVIOUS
NEW
2011
47050-4714
04008-11147
47050-47150
04008-11247
2012-2013
47050-47180
04008-11347
47050-47190
04008-11447
2014-2015
47050-47310
04008-11547
47050-47320
04008-11647
MODEL YEAR PRIUS PHV
PREVIOUS
NEW
2012-2013
47050-47210
04008-11747
2014-2015
47050-47340
04008-11847
About the Author
Information courtesy of Mitchell 1
Information for Technical Service Bulletins comes from ProDemand, Mitchell 1's auto repair information software for domestic and import vehicles. Headquartered in San Diego, Mitchell 1 has provided quality repair information solutions to the automotive industry since 1918.
Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety ofspecialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.
