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

Solution

1. Preparation

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

2. Fluid Inspection and Replacement

• Remove the transmission dipstick and check fluid level and condition.
• If the fluid is low, top off with the manufacturer-recommended transmission fluid (e.g., VW G052162A2).
• If the fluid is dark or smells burnt, perform a transmission fluid change:
  1. Drain the old fluid by removing the drain plug.
  2. Replace the transmission filter if applicable.
  3. Reinstall the drain plug and refill with fresh transmission fluid.

3. Wiring and Connector Repair

• Inspect and clean the connectors leading to the transmission control module.
• Repair or replace any damaged wires or connectors found during inspection.

4. Transmission Control Module Check

• If the wiring is intact, check the TCM for proper function.
• Reprogram or update the TCM software using a dealership-level diagnostic tool if necessary.
• If the TCM is defective, replace it:
  1. Remove the TCM cover and disconnect the wiring harness.
  2. Unbolt the TCM from its mounting location.
  3. Install the new TCM and reconnect the wiring harness.

5. Reconnect Battery and Clear Codes

• Reconnect the battery.
• Use the OBD-II scanner to clear the P0700 code and any other related codes.