how to fix P0700 transmission code in Volkswagen Golf MK7 (2015-2019)

Solution

1. Preparation

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

2. Inspect and Replace Transmission Fluid

• Tools Required: Socket set, fluid pump, catch pan
• Drain the transmission fluid into the catch pan.
• Remove the transmission pan using a socket set.
• Inspect the old transmission fluid for color and smell; it should be a bright red and not burnt.
• Replace the transmission fluid with the manufacturer-recommended type (e.g., VW G 052 162 A2).
• Reinstall the transmission pan and torque the bolts to the manufacturer specifications (typically around 10 Nm).

3. Check and Repair Wiring and Connectors

• Tools Required: Multimeter, wire strippers, electrical tape
• Inspect the wiring harness leading to the TCM and sensors for any visible damage.
• Use a multimeter to check for continuity and proper voltage at the TCM connectors.
• Repair or replace any damaged wires or connectors as necessary, ensuring solid connections.

4. TCM and Sensor Verification

• Tools Required: OBD-II scanner
• Clear the P0700 code using the OBD-II scanner.
• Test drive the vehicle to see if the code reappears.
• If the code returns, consider reprogramming or replacing the TCM based on the manufacturer's guidelines.

5. Final Check

• Reconnect the battery.
• Start the vehicle and monitor the transmission operation for smooth shifting and responsiveness.