Volkswagen Golf MK7.5 (2020-Present) P0700 code how to fix it

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is on a level surface and secure with wheel chocks.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Check and Replace Transmission Fluid

• Sub-steps:
  1. Remove the transmission fluid drain plug and drain the fluid into a suitable container.
  2. Inspect the old fluid for debris or metal shavings that might indicate internal damage.
  3. Replace the drain plug with a new gasket.
  4. Refill the transmission with the manufacturer-recommended fluid using a funnel.
  5. Start the engine and cycle through the gears while monitoring the fluid level, adding more as necessary.

3. Inspect and Replace Transmission Solenoids

• Sub-steps:
  1. Remove the transmission pan by unscrewing the bolts and carefully lowering it.
  2. Disconnect the wiring harness from the solenoids.
  3. Remove the old solenoids and install the new ones, ensuring they are seated properly.
  4. Reinstall the transmission pan with a new gasket, tightening bolts to the manufacturer-specified torque.

4. Replace or Reprogram TCM

• Sub-steps:
  1. Locate the TCM, usually found near the transmission or under the dashboard.
  2. Disconnect the wiring harness from the TCM and remove it from its mounting.
  3. Install the new TCM or reprogram the existing one using a compatible scanner that supports TCM programming.
  4. Reconnect the wiring harness and ensure all connections are secure.

5. Reconnect Battery and Test Drive

• Sub-steps:
  1. Reconnect the negative battery terminal.
  2. Start the vehicle and monitor for any warning lights.
  3. Perform a test drive to verify smooth shifting and operation.