how to fix U0101 code in Toyota Camry Eighth Generation (2018-present)?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect Wiring and Connectors

• Locate the wiring harness connecting the ECM and TCM.
• Carefully examine the connectors for any signs of wear, corrosion, or damage.
• If any issues are found, repair or replace the damaged wiring or connectors.

3. Test Electrical Supply

• Use a multimeter to check the battery voltage at the ECM and TCM connectors.
• Ensure voltage is within specifications (typically 12-14 volts).
• Check ground continuity from the modules to the chassis ground.

4. Replace Faulty Components (if necessary)

• If no issues are found with wiring and connectors, consider replacing the TCM or ECM, depending on the diagnostic results.
• Ensure that the replacement module is compatible with the vehicle's specifications.

5. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear any trouble codes from the vehicle's system.

6. Test Drive

• Conduct a test drive to ensure proper operation of the vehicle and verify that the U0101 code does not return.