C1247: owner reports and bulletins
Got C1247 on your scanner? Tell the mechanic your year, make, model and any symptoms and you'll get the likely cause and what to check first. Ask about this code.
What owners report to NHTSA
31 complaints filed with NHTSA mention C1247, 7 of them since 2015, across 4 different models. The component owners most often filed it under: service brakes.
Most-reported models
| Vehicle | Complaints | Model years reported |
|---|---|---|
| TOYOTA SEQUOIA | 20 | 2003, 2004, 2005, 2006 |
| TOYOTA PRIUS | 7 | 2004, 2005, 2008, 2012, 2013 |
Manufacturer service bulletins that name C1247
2 technical service bulletins and manufacturer communications filed with NHTSA mention C1247, from 1 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:
- TOYOTA CAMRY (2007, 2008, 2009, 2010), bulletin 10132767: TSB: Some 2007 ? 2011 model year Camry HV 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…
- TOYOTA PRIUS (2004, 2005, 2006, 2007), bulletin 10132768: 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…
Sources: NHTSA Office of Defects Investigation complaint database and manufacturer communications file, snapshots September 2026. A complaint or bulletin that mentions a code is a report about that vehicle, not a statement that the code has one cause.