OBD-II Generic Error Code P0720: How to Fix It

Q: What causes P0720 error code?

P0720 is typically caused by a faulty output speed sensor, damaged sensor wiring, low or contaminated transmission fluid, or internal transmission problems affecting the sensor's ability to read output shaft speed.

Q: Can I drive with P0720 code?

You should avoid driving with P0720 as it can cause harsh shifting, transmission damage, and unsafe driving conditions. The transmission may get stuck in one gear or shift unpredictably.

Q: How much does it cost to fix P0720?

Costs range from $50-150 for a DIY sensor replacement to $200-500 at a shop. If internal transmission problems are found, repair costs can exceed $2000 for a rebuild.

Q: Where is the output speed sensor located?

The output speed sensor is usually located on the transmission case near the output shaft, often on the tail housing or side of the transmission. Location varies by vehicle make and model.

Q: Will P0720 cause transmission to not shift?

Yes, P0720 can cause the transmission to remain stuck in one gear (usually 2nd or 3rd), shift harshly, or shift at inappropriate times because the PCM cannot accurately determine vehicle speed.

Abstract

Error code P0720 indicates a malfunction in the output speed sensor circuit, which monitors the transmission's output shaft rotation speed. This sensor is critical for proper transmission shifting and vehicle speed calculation, and when it fails, you may experience harsh shifting, speedometer issues, or the transmission getting stuck in one gear.