how to fix P0700 transmission code in Volkswagen Tiguan First Generation (2007-2018)

Solution

1. Preparation

• Gather all necessary tools and parts.
• Park the vehicle on a flat surface and engage the parking brake.
• Disconnect the battery to ensure safety while working on electrical components.

2. Check and Replace Transmission Fluid

• Tools Required: Transmission funnel, fluid catch pan.
• Remove the transmission fluid fill plug and check fluid level using a dipstick.
• If fluid is low, add the recommended transmission fluid (consult owner’s manual for specifications).
• If fluid is dirty or burnt, proceed to drain and replace the fluid:
  • Place a fluid catch pan under the transmission and remove the drain plug.
  • Allow fluid to fully drain, then replace the drain plug.
  • Refill with new transmission fluid through the fill hole, ensuring the correct amount is added.

3. Inspect and Repair Wiring

• Tools Required: Wire strippers, electrical tape, multimeter.
• Inspect the wiring harness connected to the TCM and transmission solenoids for frays or corrosion.
• Repair or replace damaged wires and secure connections using electrical tape or heat shrink tubing.

4. Test and Replace Transmission Solenoids

• Tools Required: Multimeter, socket set.
• Remove the transmission pan to access the solenoids (may require draining the fluid again).
• Disconnect the solenoids and measure their resistance with a multimeter; compare results to specifications.
• If solenoids are faulty, replace them:
  • Remove the old solenoids and install new ones, ensuring they are seated properly.
  • Reinstall the transmission pan with a new gasket, torquing bolts to manufacturer specifications.

5. Reconnect Battery and Clear Codes

• Reconnect the battery.
• Use the OBD-II scanner to clear any stored error codes.
• Test drive the vehicle to confirm proper operation and ensure the P0700 code does not reappear.