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

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the vehicle's battery to avoid electrical shorts.

2. Check Transmission Fluid

• Remove the transmission dipstick or fill plug.
• Inspect the fluid for color and consistency; it should be bright red and not have a burnt smell.
• If fluid is low or contaminated, proceed to change the fluid.

3. Replace Transmission Fluid

• Drain the old transmission fluid using a drain pan.
• Replace the transmission filter if applicable, following the manufacturer's specifications.
• Refill the transmission with the correct type of fluid as per the owner's manual (e.g., VW G052162A2 or equivalent).
• Start the engine and cycle through the gears to circulate the new fluid, then check the level again.

4. Inspect and Repair Wiring/Connectors

• Inspect the wiring harness connected to the TCM for frays, breaks, or corrosion.
• Clean and reconnect any loose or corroded connectors.
• If damaged, repair or replace the wiring as needed.

5. Replace Transmission Control Module (if necessary)

• If diagnostics indicate a malfunctioning TCM, remove the old TCM by unscrewing it from its mounting location.
• Disconnect the wiring harness from the TCM.
• Install the new TCM by reversing the removal process, ensuring all connections are secure.
• Reconnect the battery.