how to fix P0700 transmission code in Volkswagen Golf MK7 (2015-2019)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is off.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Transmission Fluid

• Tools Required: Transmission fluid pump, fluid catch pan, socket set, torque wrench
• Remove the transmission fluid drain plug and allow the old fluid to drain completely into the catch pan.
• Inspect the drained fluid: it should be a bright red color. If it is dark or has a burnt smell, it indicates the need for replacement.
• Reinstall the drain plug and torque it to the manufacturer’s specifications (typically around 30 Nm).
• Using the transmission pump, refill the transmission with the correct type of fluid (consult the owner's manual for specifications).

3. Inspect Wiring Harness and Connectors

• Visually inspect the wiring harness connected to the TCM and transmission solenoids for frays or corrosion.
• If damage is found, repair or replace the affected wiring and connectors.

4. Reset the TCM

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear all diagnostic trouble codes, including P0700.
• Start the vehicle and allow it to reach operating temperature.

5. Test Drive

• Take the vehicle for a test drive to ensure proper operation of the transmission.
• Monitor for any warning lights or symptoms during the drive.