how to fix the P0720 code in my Skoda Octavia NFL (2020-Present)

Learn how to diagnose and fix P0720 vehicle speed sensor issues in Skoda Octavia NFL. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather tools: OBD-II scanner, multimeter, socket set, torque wrench, and electrical cleaner.
• Disconnect the negative battery terminal to ensure safety while working on electrical components.

2. Inspect and Replace Vehicle Speed Sensor

1. Locate the Vehicle Speed Sensor:

   • Refer to the vehicle's service manual for the exact location of the VSS (usually mounted on the transmission).

2. Remove the Old Sensor:

   • Disconnect the electrical connector from the speed sensor.
   • Use a socket or wrench to unbolt and remove the sensor from its mounting location.

3. Install the New Sensor:

   • Apply a small amount of thread sealant to the threads of the new sensor (if recommended).
   • Install the new sensor by threading it into place and tightening it to manufacturer specifications (typically around 10-12 Nm).
   • Reconnect the electrical connector securely.

3. Verify Connections and Test

1. Inspect Wiring:

   • Check all wiring and connectors for any remaining damage. Repair or replace as necessary.

2. Reconnect Battery:

   • Reconnect the negative terminal of the battery.

3. Clear Codes and Test Drive:

   • Use the OBD-II scanner to clear the P0720 code.
   • Perform a test drive to ensure the speedometer operates correctly and that the check engine light does not reappear.