C1095 — Definitions depend on the manufacturer

C1095: Definitions depend on the manufacturer — what it means, the affected system and what to check before replacing parts.

Meaning, symptoms, causes and checks

ABS Hydraulic Pump Motor Circuit Failure. Source catalogue definition; confirm applicability using vehicle service information.

Affected system: Chassis

Symptoms

  • ABS warning light illuminated on dashboard
  • Loss of anti-lock braking functionality
  • Increased stopping distance
  • Grinding or abnormal noise from the ABS pump
  • Brake pedal feels spongy or unresponsive

Possible causes

  • Faulty ABS hydraulic pump motor
  • Blown ABS motor fuse or relay
  • Corroded or damaged electrical wiring harness
  • Defective ABS control module
  • Poor electrical ground connection

What to check

  • Inspect the ABS motor fuse and relay for continuity or damage
  • Examine the electrical connector at the ABS pump for signs of corrosion or pin damage
  • Measure voltage at the ABS motor harness connector to verify power supply
  • Perform a ground circuit resistance test to ensure proper return path
  • Test the ABS pump motor operation using a diagnostic scan tool
  • Check the ABS control module for internal fault codes or stored hardware errors

Also written as: C1095-00, C109500 (some scan tools add the fault-type byte, e.g. -00).