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C0031 Chassis

Left Front Wheel Speed Sensor Circuit Low

Voltage on the left front wheel speed sensor circuit is below the expected range. The fault is typically caused by a short to ground or an open in the supply line.

Affected components

  • Wheel speed sensor fl
  • Sensor wiring
  • Abs control module

Common causes

  • High likelihood: Sensor wiring shorted to ground
  • Medium likelihood: Sensor coil open internally
  • Low likelihood: Connector pins corroded - high contact resistance

Possible symptoms

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

Sources

Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.

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