how to resolve U0101 code on Honda Pilot Third Generation (2016-present)?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the vehicle battery to ensure safety while working on electrical components.

2. Inspect and Repair Wiring Harness

• Tools Required: Wire stripper, electrical tape, soldering iron, multimeter.
• Inspect the wiring harness connecting the ECM and TCM for any visible damage.
• If damage is found, repair the wiring by stripping the insulation, twisting the wires together, and sealing with electrical tape or soldering.
• Ensure that all connections are secure and free from corrosion.

3. Test and Replace Components

• Tools Required: Multimeter, OBD-II scanner.
• Reconnect the battery and power on the vehicle.
• Use a multimeter to test the voltage at the ECM and TCM connectors. The voltage should be within the manufacturer’s specifications (consult service manual).
• If the voltage is incorrect, trace the wiring back to the source to identify any additional issues.
• If both modules are receiving proper voltage but the code persists, consider replacing the TCM or ECM as necessary, ensuring to program the new module if required.

4. Clear Codes and Test Drive

• Tools Required: OBD-II scanner.
• After making repairs, use the OBD-II scanner to clear the U0101 code.
• Test drive the vehicle to ensure that the symptoms are resolved and that the check engine light does not reappear.