my Tesla Model S Plaid/Refresh (2021-present) shows error code P0720 what does it mean

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

Error Code: P0720

3 min read

424 words

Problem Statement

Learn how to diagnose and fix P0720 vehicle speed sensor issues in Tesla Model S Plaid. 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 to prevent short circuits.

Symptoms

•Check engine light illuminated
•Erratic speedometer reading
•Transmission shifting issues
•Loss of cruise control functionality
•Decreased acceleration response

Diagnostic Steps

1
Scan for additional error codes using an OBD-II scanner to check for related issues.
2
Inspect the vehicle speed sensor wiring harness for any visible damage or loose connections.
3
Test the vehicle speed sensor with a multimeter to ensure it is functioning correctly.
4
Check the vehicle’s transmission fluid level and condition, as low or contaminated fluid can affect sensor performance.
5
Clear the error code and perform a test drive to see if the code reappears.

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
•Multimeter
•Socket set
•Torque wrench

Parts Required

•Vehicle speed sensor

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Scan for additional error codes using an OBD-II scanner to check for related issues.
2
Inspect the vehicle speed sensor wiring harness for any visible damage or loose connections.
3
Test the vehicle speed sensor with a multimeter to ensure it is functioning correctly.
4
Check the vehicle’s transmission fluid level and condition, as low or contaminated fluid can affect sensor performance.
5
Clear the error code and perform a test drive to see if the code reappears.

Solution

1. Preparation

Gather tools and parts needed.
Ensure the vehicle is parked on a level surface and engage the parking brake.

Tools Required:

OBD-II scanner
Multimeter
Socket set
Torque wrench

2. Inspect and Repair Wiring

Sub-steps:
- Disconnect the battery to ensure safety.
- Remove any protective covers to access the vehicle speed sensor wiring.
- Visually inspect wiring for frays, breaks, or corrosion.
- Repair or replace damaged wiring as necessary.

3. Replace Vehicle Speed Sensor

Sub-steps:
- Locate the vehicle speed sensor, typically found on the transmission.
- Using the socket set, remove the bolts securing the sensor.
- Carefully pull the old sensor out and disconnect the wiring harness.
- Connect the new sensor to the wiring harness and install it back into the transmission.
- Torque the bolts to the manufacturer's specifications (consult service manual for exact torque value).

4. Reconnect Battery and Clear Codes

Sub-steps:
- Reconnect the battery terminals.
- Use the OBD-II scanner to clear the P0720 error code.
- Perform a test drive to confirm the repair was successful.