P0720 Output Speed Sensor Circuit

Powertrain Severity: Moderate Generic OBD-II

The transmission output speed signal is missing or invalid.

Common causes

  • Faulty output speed sensor
  • Wiring damage

Symptoms

  • Erratic speedometer
  • Harsh shifting
  • Limp mode

What to check

  1. Inspect sensor and wiring
  2. Check signal on a scan tool

Manufacturers may add their own detail to generic codes. If your vehicle shows a different description for P0720, follow the service information for that make and model.