C0536Motor Control B Circuit/Open
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- Motor control B finds its load missing. The module expects a closed path through the windings of channel B and sees an open circuit instead – a pulled connector, a cut lead, corroded pins or an internal break in the motor. Brake controllers have run dedicated open-circuit routines for pump motors for decades, as in a Kelsey-Hayes patent (now ZF) that checks the motor circuit while the pump is not requested; current bridge driver chips like the DRV8873-Q1 from TI provide open-load detection both in standby and during operation. J2012 does not identify the motor behind B and no public manufacturer documentation of C0536 was found. Until repaired the motor stays dead and the function it serves is unavailable; compare C0531 for channel A.
- What you may notice
- Warning lamp of the affected system on
- Motor B shows no reaction
- Likely causes
- LikelyConnector to motor B pulled off or pins corroded
- PossibleMotor lead cut or broken in the harness
- PossibleInternal break in motor B (winding, brush)
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.