how to fix P0720 code in Tesla Outback 6th Generation (2020-2024)

Subaru Outback 6th Generation (2020-2024)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

Error Code: P0720

3 min read

513 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 output speed sensor issues in Tesla Outback 6th Generation. Step-by-step guide with diagnostic procedures and repair instructions.

Error Code

P0720

Affected Component

Transmission

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the vehicle to cool before inspecting the transmission.

Symptoms

•Check engine light illuminated
•Erratic transmission shifting
•Reduced engine performance
•Transmission slipping or harsh engagement
•Poor fuel economy
•Vehicle speedometer malfunctioning

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to confirm P0720 and check for any related codes.
2
Inspect the output speed sensor wiring and connectors for damage or corrosion.
3
Verify the output speed sensor's resistance using a multimeter according to manufacturer specifications.
4
Check the vehicle's transmission fluid level and condition.
5
Inspect the transmission control module (TCM) for any signs of failure or communication issues.
6
Test drive the vehicle to monitor transmission behavior and confirm symptoms.

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
•Torque wrench
•Multimeter

Parts Required

•Output speed sensor
•Electrical connectors (if wiring is damaged)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to confirm P0720 and check for any related codes.
2
Inspect the output speed sensor wiring and connectors for damage or corrosion.
3
Verify the output speed sensor's resistance using a multimeter according to manufacturer specifications.
4
Check the vehicle's transmission fluid level and condition.
5
Inspect the transmission control module (TCM) for any signs of failure or communication issues.
6
Test drive the vehicle to monitor transmission behavior and confirm symptoms.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and the ignition is off.
Disconnect the battery to prevent electrical shock.

2. Inspect and Replace Output Speed Sensor

Tools Required:
- Socket set
- Torque wrench
- Multimeter
- OBD-II scanner
Sub-steps:
1. Locate the output speed sensor on the transmission.
2. Disconnect the electrical connector from the sensor.
3. Remove the mounting bolts securing the sensor using a socket.
4. Carefully pull the sensor out from its housing.
5. Install the new output speed sensor by reversing the removal steps, ensuring it is seated properly.
6. Torque the mounting bolts to the manufacturer's specifications (check service manual for exact torque values).

3. Wiring Inspection and Repair

Sub-steps:
1. Inspect the wiring harness leading to the output speed sensor for any signs of wear or damage.
2. If damaged, repair the wiring using solder or appropriate connectors ensuring a solid connection.
3. Recheck the electrical connections to ensure they are secure and free of corrosion.

4. Reconnect Battery and Clear Codes

Reconnect the battery terminals securely.
Use the OBD-II scanner to clear the P0720 code from the vehicle's computer.