C1252: owner reports and bulletins
Got C1252 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
43 complaints filed with NHTSA mention C1252, 43 of them since 2015, across 13 different models. The component owners most often filed it under: service brakes.
Most-reported models
| Vehicle | Complaints | Model years reported |
|---|---|---|
| TOYOTA PRIUS | 16 | 2008, 2010, 2012, 2013, 2014 |
| TOYOTA HIGHLANDER HYBRID | 5 | 2006, 2007, 2008 |
| TOYOTA PRIUS V | 5 | 2012, 2013 |
| LEXUS CT | 5 | 2013, 2014, 2015 |
| TOYOTA HIGHLANDER | 3 | 2008 |
Manufacturer service bulletins that name C1252
57 technical service bulletins and manufacturer communications filed with NHTSA mention C1252, from 5 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:
- CHRYSLER PACIFICA (2017, 2018, 2019, 2020), bulletin 10173320: ESC Light Illuminated. DTC C1252-92 VACUUM PUMP CONTROL CIRCUIT And Or P258B ELECTRONIC VACUUM PUMP PERFORMANCE
- JEEP CHEROKEE (2017, 2018, 2019, 2020), bulletin 10173320: ESC Light Illuminated. DTC C1252-92 VACUUM PUMP CONTROL CIRCUIT And Or P258B ELECTRONIC VACUUM PUMP PERFORMANCE
- RAM 1500 (2019, 2020), bulletin 10173320: ESC Light Illuminated. DTC C1252-92 VACUUM PUMP CONTROL CIRCUIT And Or P258B ELECTRONIC VACUUM PUMP PERFORMANCE
- JEEP GLADIATOR (2020), bulletin 10178688: Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further inves…
- LEXUS RX HYBRID (2016, 2017, 2018, 2019), bulletin 10234304: TSB: Some 2016 ? 2019 model year RX 450h vehicles may exhibit a condition where the brake, ABS, and/or TRAC warning lights are on and/or a Check VSC message displays. One or more of the following specific Diagnostic Trou…
- TOYOTA PRIUS V (2016, 2017, 2018), bulletin 10234318: TSB: Some 2016 ? 2018 model year Prius V vehicles may exhibit a condition where the brake, ABS, and/or TRAC warning lights are on and/or a Check VSC message displays. One or more of the following Diagnostic Trouble Codes…
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.