how to fix P0700 transmission fault code on Volkswagen Golf Eighth Generation (2020-present)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the vehicle battery to ensure safety before beginning work.
• Raise the vehicle using a jack and secure it with jack stands if necessary.

2. Inspect and Replace Transmission Fluid

• Sub-steps:
  1. Locate the transmission fluid drain plug and remove it using a socket set.
  2. Allow the old fluid to drain completely into a suitable container.
  3. Replace the transmission fluid filter if applicable (check manufacturer specifications).
  4. Refill the transmission with the correct type of fluid as specified in the owner’s manual.
  5. Reinstall the drain plug and torque it to the manufacturer’s specifications.

3. Repair or Replace TCM

• Sub-steps:
  1. Locate the TCM, usually found near the transmission or under the dashboard.
  2. Disconnect the wiring harness from the TCM.
  3. Remove the TCM mounting bolts and carefully take out the old TCM.
  4. Install the new TCM, ensuring it is properly seated and secured.
  5. Reconnect the wiring harness and double-check for any loose connections.

4. Transmission Range Sensor Inspection

• Sub-steps:
  1. Locate the transmission range sensor on the transmission.
  2. Disconnect the wiring connector from the sensor.
  3. Test the sensor using a multimeter to ensure it functions correctly (check for resistance changes when shifting through gears).
  4. Replace the sensor if it fails the test.