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

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the battery to prevent electrical shorts.

2. Check and Replace Transmission Fluid

• Tools Required: Socket set, funnel, transmission fluid pump
• Remove the transmission fluid drain plug using the socket set and allow the fluid to drain completely into a suitable container.
• Inspect the drained fluid for metal shavings or burnt odor, indicating potential transmission damage.
• Replace the drain plug and refill the transmission using the manufacturer-recommended fluid type through the fill hole.
• Monitor the fluid level with the dipstick and adjust as necessary.

3. Inspect and Repair TCM Connections

• Tools Required: Screwdriver, cleaning brush, electrical contact cleaner
• Remove the TCM from its mounting location by unscrewing any retaining screws.
• Clean the TCM connectors and wiring harness with electrical contact cleaner and a brush to remove corrosion.
• Reconnect the TCM ensuring a secure fit and proper alignment.

4. Replace Faulty Components

• If diagnostic steps indicate a faulty transmission fluid temperature sensor:
  • Tools Required: Socket set, replacement temperature sensor
  • Disconnect the wiring harness from the temperature sensor.
  • Remove the faulty sensor using a socket set.
  • Install the new sensor and reconnect the wiring harness.