P0720 – Output Speed Sensor Circuit

Description

The ECM detects a malfunction in the output speed sensor circuit.

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Symptoms

  • Harsh shifting
  • Speedometer not working
  • Limp mode

Causes

  • Faulty OSS sensor
  • Damaged wiring
  • Tone wheel damage

Diagnosis

  • Monitor OSS data
  • Inspect wiring
  • Check tone wheel

Repair

  • Replace OSS sensor
  • Repair wiring
  • Replace tone wheel