OBD-II FAULT CODE
C1278

STEERING Wheel Angle 1and 2 Signal Faulted

Reference information for C1278. 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
Steering systemCategory
HighSeverity
  • ABS/traction/steering/suspension warning lamp or abnormal chassis behaviour
  • Steering warning lamp or heavy/abnormal steering
  • Low voltage
  • Steering angle/torque sensor fault
  • Power steering motor/module issue
  • Wiring fault
  • Inspect wheel/brake/suspension area, connectors, sensor wiring and module power/ground
  • Check battery/charging system
  • Calibrate steering angle sensor if required after repair/alignment
  • Repair wiring/power supply, perform calibration, replace failed sensor/module after confirmation
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Disclaimer: Information is provided for general guidance only and may not apply to all vehicles. Always consult a qualified technician.