P1722 – VSS Signal Fault (Nissan)

Description

The ECM detected an abnormal or missing VSS signal.

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Symptoms

  • Harsh shifting
  • Warning light

Causes

  • Open circuit
  • Sensor failure
  • ECM logic error

Diagnosis

  • Check wiring
  • Inspect sensor
  • Scan ECM data

Repair

  • Repair wiring
  • Replace sensor