how to fix P0700 code in Volkswagen Golf MK5 (2004-2008)

Solution

1. Preparation

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

2. Check and Replace Transmission Fluid

• Tools Required: Transmission fluid pump, 17mm socket, funnel.
• Sub-steps:
  1. Remove the transmission fluid filler plug using the 17mm socket.
  2. Check the fluid level; if low, add the correct type of transmission fluid specific to VW (e.g., VW G052162A2).
  3. If the fluid is dark or has a burnt smell, consider a fluid change.
  4. To change the fluid, drain the old fluid from the drain plug, replace the drain plug, and refill with new fluid using the pump and funnel.

3. Inspect and Repair Wiring and Connectors

• Tools Required: Multimeter, wire stripper/crimper.
• Sub-steps:
  1. Inspect the wiring harness leading to the TCM and transmission for any signs of wear, fraying, or damage.
  2. Use a multimeter to test for continuity in the wiring.
  3. Repair or replace any damaged sections of the wiring harness.
  4. Ensure all connectors are seated properly and free from corrosion.

4. Test and Replace Transmission Control Module (if necessary)

• Tools Required: OBD-II scanner, multimeter.
• Sub-steps:
  1. If the TCM is not responding during testing, consider replacing it.
  2. Remove the TCM by disconnecting the electrical connectors and unbolting it from its mount.
  3. Install the new TCM and reconnect all connectors.
  4. Reconnect the negative battery terminal.