how to fix P0700 code on my Volkswagen Golf MK7 (2015-2019)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to avoid electrical shorts.
• Ensure the vehicle is on a level surface and secured with wheel chocks.

2. Fluid Change

• Sub-steps:
  1. Locate the transmission fluid drain plug and remove it using a socket wrench.
  2. Allow the old fluid to drain completely into a catch pan.
  3. Replace the drain plug and torque to the manufacturer’s specification (usually around 20 Nm).
  4. Remove the fill plug and use a fluid pump to add the correct type of transmission fluid (consult owner’s manual for specifications).
  5. Reinstall the fill plug and torque to specification.

3. Wiring Inspection

• Sub-steps:
  1. Inspect the wiring harness connected to the TCM and the transmission for any visible damage.
  2. Use a multimeter to test for continuity in the wiring.
  3. Repair or replace any damaged wiring as necessary.

4. TCM Testing

• Sub-steps:
  1. Locate the TCM, usually found near the transmission.
  2. Disconnect the electrical connector from the TCM.
  3. Use a multimeter to check for proper voltage at the connector pins.
  4. If voltage is present but the TCM is unresponsive, consider replacing the TCM.

5. Speed Sensor Check

• Sub-steps:
  1. Identify the vehicle speed sensors (usually located on the transmission).
  2. Disconnect the sensor connectors.
  3. Test the sensors with a multimeter to ensure they are functioning correctly.
  4. Replace any faulty speed sensors as needed.