OBD2 Error Code P0720: How to Fix It

Q: What are the symptoms of a P0720 error code?

Common symptoms include harsh or delayed shifting, transmission slipping, speedometer not working properly, poor fuel economy, and the transmission may go into limp mode for protection.

Q: Can I drive with a P0720 code?

While you may be able to drive short distances, it's not recommended. The transmission may shift poorly or unpredictably, and continued driving could cause additional transmission damage.

Q: How much does it cost to fix a P0720 error?

If it's just the output speed sensor, repair costs typically range from $100-300 including parts and labor. However, if internal transmission damage is present, costs can be significantly higher.

Q: What causes an output speed sensor to fail?

Common causes include normal wear and tear, contaminated transmission fluid, electrical issues, physical damage from road debris, or internal transmission problems creating metal particles that damage the sensor.

Q: How often should the output speed sensor be replaced?

Output speed sensors don't have a specific replacement interval and typically last 100,000+ miles. They're usually replaced only when they fail or show symptoms of malfunction.

Abstract

OBD2 error code P0720 indicates a malfunction in your vehicle's output speed sensor (OSS) circuit. This sensor monitors the rotational speed of the transmission output shaft and sends this data to the transmission control module. When this sensor fails or its circuit has issues, it can cause poor shifting, harsh engagement, or transmission slipping.