how to fix P0700 transmission control system malfunction in Skoda Octavia NFL

Solution

1. Preparation

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

2. Inspect and Replace Transmission Fluid

• Tools Required: Transmission fluid pump, drain pan.
• Sub-steps:
  1. Locate the transmission drain plug and remove it to drain the old fluid into a pan.
  2. Inspect the fluid for metal particles and burnt smell; if present, further internal inspection may be required.
  3. Replace the drain plug and refill the transmission with the specified fluid type using the pump.
  4. Clear any air pockets by running the vehicle through gears while checking the fluid level.

3. Repair or Replace Wiring and Connectors

• Tools Required: Wire strippers, soldering iron, heat shrink tubing.
• Sub-steps:
  1. Identify and repair any damaged wiring or connectors found during the diagnostic inspection.
  2. Cut out damaged sections of wire and splice in new wire, ensuring proper insulation with heat shrink tubing.
  3. Secure all connections and ensure there are no exposed wires.

4. Test and Replace the TCM (if necessary)

• Tools Required: OBD-II scanner.
• Sub-steps:
  1. If the TCM fails the functional test, remove it from the vehicle.
  2. Disconnect all wiring harnesses and remove mounting screws.
  3. Install the new TCM by reversing the removal process.
  4. Reconnect all wiring and secure the module in place.

5. Reconnect Battery and Clear Codes

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