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TransmissionSeverity Medium: diagnose soon

P0720Output Speed Sensor Circuit

What it means

The transmission control sees no usable signal from the output speed sensor.

Symptoms

  • Harsh, late or missing shifts
  • Transmission in limp mode (stuck in one gear)
  • Gearbox or check engine warning light

Common causes

  • Faulty output speed sensor
  • Wiring or connector fault
  • Damaged tone ring

What to check first

  1. Compare output speed with vehicle speed
  2. Check sensor and wiring
  3. Inspect the tone ring
Can I drive with P0720? Usually yes for a short distance, but performance or economy may suffer and the fault can get worse. Diagnose it soon.

Generic OBD-II meaning. Manufacturer-specific meanings and checks can differ; always check the service information for the car.

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P0720: questions and answers

What does P0720 mean?

P0720: Output Speed Sensor Circuit. The transmission control sees no usable signal from the output speed sensor.

What are the symptoms of P0720?

Harsh, late or missing shifts. Transmission in limp mode (stuck in one gear). Gearbox or check engine warning light.

What causes P0720?

Faulty output speed sensor. Wiring or connector fault. Damaged tone ring.

How do you diagnose P0720?

1. Compare output speed with vehicle speed 2. Check sensor and wiring 3. Inspect the tone ring

Can I drive with P0720?

Usually yes for a short distance, but performance or economy may suffer and the fault can get worse. Diagnose it soon.