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C055C

ABS Pump Motor Supply Voltage Circuit A Range/Performance

ABS pump motor supply voltage A drifts or fluctuates outside spec.

  • Check engine light: Yes
  • Emissions related: No
  • Repair difficulty: medium

Symptoms

  • ABS warning light on
  • ESC/stability control deactivated
  • Possible reduced brake assist
  • Speedometer may behave erratically

Common causes

Ordered by how often each turns out to be the cause.

  • Connector with high resistanceCommon
  • Sensor element aged beyond calibration windowLess likely
  • Sensor mounting loose - signal dampingLess likely

Parts involved

  • ABS Pump Motor Supply A

C055C is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.