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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety during repairs.
• Raise the vehicle and secure it on jack stands.

2. Inspect and Replace Transmission Fluid

• Check Fluid Level:
  • Remove the transmission dipstick and wipe it clean.
  • Reinsert and check the fluid level; add fluid if necessary.
• Replace Fluid:
  • Drain the old transmission fluid using a drain pan.
  • Remove the transmission pan (if applicable) and replace the filter.
  • Reinstall the pan and torque the bolts to manufacturer specifications (usually around 8-10 Nm).
  • Fill the transmission with new OEM-spec fluid (consult the owner’s manual for the correct type and amount).

3. Inspect Wiring and Connectors

• Carefully examine the wiring harness connected to the TCM and transmission for any damage.
• Clean any corroded connectors with electrical contact cleaner.
• Replace any damaged wiring or connectors as necessary.

4. Test the Transmission Control Module (TCM)

• Reconnect the battery.
• Use a compatible OBD-II scanner to clear the P0700 code.
• Test drive the vehicle to see if the code reappears or if shifting issues persist.

5. Replace the TCM (if necessary)

• If the code returns and the TCM is deemed faulty, remove the old TCM by unscrewing it from its mounting location.
• Connect the new TCM ensuring all connectors are secure.
• Reconnect the battery and perform a reset using the OBD-II scanner.