FAULTBASE
Error CodesASKCars
© 2025 FAULTBASE
All rights reserved.
v2.0.0 • Production
ContactPrivacyImpressum
Home/Cars/Toyota/Corolla/E210 (2019-2024)/how to diagnose a P0720 code on my Toyota Corolla E210 (2019-2024)

how to diagnose a P0720 code on my Toyota Corolla E210 (2019-2024)

Toyota Corolla E210 (2019-2024)

Error Codes
Severity: highDifficulty: mediumError Code: P07202-4 hours
3 min read
475 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 Toyota Corolla E210. Step-by-step guide with diagnostic procedures and repair instructions.

Error Code
P0720
Affected Component
Transmission
Estimated Time
2-4 hours

Safety Warnings

  • ⚠Disconnect the battery before working on electrical systems.
  • ⚠Allow the engine to cool before accessing the transmission.

Symptoms

  • •Check engine light illuminated
  • •Erratic shifting or harsh transmission behavior
  • •Speedometer malfunction or inaccurate readings
  • •Engine stalling or poor acceleration
  • •Reduced fuel efficiency

Diagnostic Steps

  1. 1Scan for error codes using an OBD-II scanner to confirm P0720 and check for any related codes.
  2. 2Inspect the vehicle's speed sensor wiring harness and connectors for any visible damage or corrosion.
  3. 3Measure the output speed sensor voltage using a multimeter while the engine is running.
  4. 4Check the output speed sensor resistance according to the manufacturer specifications.
  5. 5Inspect the vehicle’s transmission fluid level and condition, as low or contaminated fluid can cause sensor issues.
  6. 6Test the vehicle's powertrain control module (PCM) for proper function and communication with the speed sensor.

Solution

Solution

1. Preparation

  • Gather necessary tools and parts.
  • Disconnect the negative battery terminal to ensure safety.
  • Raise the vehicle securely on jack stands if access to the transmission is needed.

2. Inspect and Repair Wiring

  • Sub-steps:
    • Visually inspect the wiring harness connected to the output speed sensor.
    • Repair or replace any damaged wires or corroded connectors.
    • Ensure all connections are secure.

3. Replace Output Speed Sensor

  • Sub-steps:
    • Locate the output speed sensor on the transmission.
    • Disconnect the wiring harness from the sensor.
    • Remove the sensor using a socket set, noting the torque specifications for reinstallation.
    • Install the new sensor, tightening it to the manufacturer's torque specifications.
    • Reconnect the wiring harness securely.

4. Refill Transmission Fluid (if necessary)

  • Sub-steps:
    • If the fluid level was low, drain the old fluid completely.
    • Replace with the manufacturer-recommended transmission fluid.
    • Refill to the proper level as indicated in the owner’s manual.

5. Reset the Check Engine Light

  • Sub-steps:
    • Reconnect the negative battery terminal.
    • Use the OBD-II scanner to clear the P0720 code.

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
  • •Jack and jack stands

Parts Required

  • •Output speed sensor
  • •Transmission fluid (if needed)

Additional Information

Error Code
P0720
Affected Component
Transmission
Estimated Time
2-4 hours
Difficulty
medium
Severity
high
Tools Required
5 items
Parts Required
2 items

Related Faults

  1. What causes the transmission to hesitate when shifting gears in a 2019 Toyota Corolla?

    When a 2019 Toyota Corolla experiences hesitation when shifting gears, it can be attributed to several potential causes. Below is a detailed guide to diagnose and address this issue.

  2. How to fix the Toyota Corolla E210's door locks not functioning properly?

    When the door locks on a Toyota Corolla E210 (2019-2024) are not functioning properly, it can be due to several potential issues such as a faulty door lock actuator, a blown fuse, or a problem with th

  3. What could cause the power windows to malfunction in my 2022 Toyota Corolla?

    When experiencing power window malfunctions in a 2022 Toyota Corolla E210, several potential causes could be responsible. Below are detailed steps to diagnose and resolve the issue:

  4. Why does the Toyota Corolla E210 experience hesitation during acceleration?

    Experiencing hesitation during acceleration in a Toyota Corolla E210 (2019-2024) can be frustrating and potentially dangerous. Here’s a detailed guide to diagnosing and addressing this issue:

  5. What are the possible causes of a fuel smell inside the cabin of my 2020 Toyota Corolla E210?

    Discover causes and solutions for fuel smell in 2020 Corolla. Diagnose fuel leaks, EVAP issues, and more with our step-by-step guide.

    Fuel System3 symptoms

  6. What solutions exist for a Toyota Corolla E210's exhaust system rattling noise?

    To address a rattling noise in the exhaust system of a Toyota Corolla E210 (2019-2024), follow these detailed steps to diagnose and resolve the issue:

Share this solution

Comments

Sign in to share your thoughts

Sign In

No comments yet

Be the first to share your thoughts

Back to Generation