P0720 Code - Output Speed Sensor Circuit Malfunction

What does P0720 Mean?

OBD-II Code P0720 is defined as a Output Speed Sensor Circuit Malfunction

When the code P0720 is set in the Powertrain Computer, it means that the Powertrain Computer or PCM is not seeing a rational speed signal from the Output Sensor or, there is a greater than specified RPM difference between the rotational speed of the Input RPM Sensor and the Transmission Output Speed RPM Sensor. This can occur during shifting or when driving at steady speeds in the same gear. It often implies that the transmission is slipping.

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What are the common causes of P0720 ?

The most common causes of this code being stored are due to a defective output speed sensor or input speed sensor. Other common causes include shorted, open, corroded, or damaged wiring circuits or connectors, faulty shift solenoid/s, defective engine drivability sensors (especially the engine temperature sensor), dirty or contaminated transmission fluid that restricts flow, defective valve body, a faulty PCM. PCM failure is rare.



How do you troubleshoot P0720 ?

Repairs for the P0720 trouble code include:

• Replacement of the output speed sensor
• Replacement of the input speed sensor
• Replacement of the wires or connectors
• Drain and refill of the transmission fluid
• Replacement of the PCM

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