how to address the P0720 code in my Tesla Model S?

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-2 hours

Time

medium

Difficulty

high

Severity

Error Code: P0720

3 min read

462 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix P0720 vehicle speed sensor issues in Tesla Model S. Step-by-step guide with diagnostic procedures and repair instructions.

Error Code

P0720

Affected Component

Transmission

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the vehicle to cool down if it has been running before working on the engine components.

Symptoms

•Check engine light illuminated
•Erratic or incorrect speedometer readings
•Loss of traction control functionality
•Unresponsive acceleration
•Powertrain performance issues

Diagnostic Steps

1
Scan the vehicle using an OBD-II scanner to confirm the P0720 code and check for any related codes.
2
Inspect the vehicle speed sensor connector for corrosion, damage, or loose connections.
3
Check the wiring harness leading to the vehicle speed sensor for signs of wear or shorts.
4
Measure the output voltage of the vehicle speed sensor using a multimeter while the vehicle is in motion.
5
Inspect the vehicle speed sensor for physical damage or debris obstructing its function.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Socket set
•Multimeter
•Torque wrench
•Screwdriver set

Parts Required

•Vehicle speed sensor (specific to Tesla Model S)

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Diagnostic Steps

1
Scan the vehicle using an OBD-II scanner to confirm the P0720 code and check for any related codes.
2
Inspect the vehicle speed sensor connector for corrosion, damage, or loose connections.
3
Check the wiring harness leading to the vehicle speed sensor for signs of wear or shorts.
4
Measure the output voltage of the vehicle speed sensor using a multimeter while the vehicle is in motion.
5
Inspect the vehicle speed sensor for physical damage or debris obstructing its function.

Solution

1. Preparation

Gather tools and parts needed for the repair.
Ensure the vehicle is parked on a flat surface and the ignition is off.
Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Vehicle Speed Sensor

Tools Required:
- Socket set
- Multimeter
- Torque wrench
- Screwdriver set
Sub-steps:
1. Locate the vehicle speed sensor, typically found on the transmission or differential.
2. Disconnect the electrical connector from the speed sensor.
3. Remove the mounting bolts using the socket set and carefully take out the speed sensor.
4. Compare the old sensor with the new one to ensure compatibility.
5. Install the new vehicle speed sensor by reversing the removal steps:
  - Place the new sensor into position.
  - Torque the mounting bolts to the manufacturer’s specification (consult service manual for exact torque value).
  - Reconnect the electrical connector securely.

3. Reconnect Battery and Test

Reconnect the negative battery terminal.
Start the vehicle and allow it to idle for a few minutes.
Monitor the dashboard for any warning lights.