C0252Pump Motor Ground Circuit Open
- Generic OBD-II code · Chassis
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- C0252 has no entry in the publicly available J2012 tables, nor does any maker tie it to a pump motor ground. Saab and GM use it for stability control plausibility. The 2002 to 2010 Saab 9-5 with Bosch ESP sets it after a rare event while ABS or ESP is regulating, such as the car sliding sideways with locked wheels, or after a brief voltage drop at the steering angle or yaw rate sensor. The 2011 9-5 (GM) calls it Vehicle Stability Control Module Sensors Correlation Malfunction: steering angle, yaw rate and lateral acceleration disagree, or straight driving is not recognised within 2.5 km. GM bulletin PIC3171E links C0252 on the 2005 to 2006 Cadillac STS to a loose lower steering column bearing that corrupts the steering position signal.
- What you may notice
- ESP OFF or stability control lamp on
- Unwanted stability control intervention when turning
- Stability control and hill start assist disabled
- Likely causes
- LikelySteering angle sensor not calibrated, misaligned or disturbed by column play
- PossibleLoose or wrongly mounted yaw rate / multi-axis acceleration sensor
- PossibleIncorrect wheel alignment after suspension work
- RareRare driving situation during regulation (sliding with stationary wheels)
- Repair
- Medium · Usually a job for a workshop.Typical cost: €0 – €800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.