OBD-II FAULT CODE
C1751

Vehicle Speed Sensor # 1 Output Circuit Short to Vbatt

Reference information for C1751. Because this is manufacturer-specific, confirm the exact definition for the vehicle before using the diagnostic guidance below.

Manufacturer-specific code

This code can have different meanings depending on vehicle make, model and year. Treat the definition below as a reference and confirm it with OEM service information before diagnosis or repair.

ChassisSystem
Speed sensorCategory
MediumSeverity
  • ABS/traction/steering/suspension warning lamp or abnormal chassis behaviour
  • Faulty speed sensor
  • Damaged tone wheel
  • Wiring fault
  • ABS/TCM data issue
  • Inspect wheel/brake/suspension area, connectors, sensor wiring and module power/ground
  • Compare live speed data from relevant modules
  • Inspect sensor and harness
  • Repair wiring or replace confirmed faulty sensor/tone wheel
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Disclaimer: Information is provided for general guidance only and may not apply to all vehicles. Always consult a qualified technician.