P0C56Drive Motor B Position Sensor Circuit A Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0C56 flags a plausibility problem on Circuit A of the motor B resolver: the winding is connected and its level sits inside the electrical window, yet the signal it carries does not fit, for instance because it wanders or no longer matches the second winding. No manufacturer documents this code publicly. The closest published case is the motor A version P0C51, which Bentley traces to connector pin fit and contamination on its 2025 Continental hybrids. Possible reasons on motor B are the same kind of contact issue, a resolver with weakened output or interference on poorly shielded lines. P0C57 to P0C59 cover hard low, high and sporadic faults, and P0A46 judges the overall motor B angle signal.
- What you may notice
- Hybrid warning and check engine lamp
- Motor B torque limited or switched off
- Occasional shudder when motor B takes load
- Likely causes
- LikelyPoor pin fit or contamination at the motor B resolver connector
- PossibleDamaged shield or twisted pair letting interference onto Circuit A
- PossibleMotor B resolver winding with weakened output
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €150 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.