how to fix P0701 code in Tesla Model S Plaid/Refresh (2021-present)

Learn how to diagnose and fix P0701 transmission control issues in Tesla Model S Plaid. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the vehicle's battery to ensure safety during repairs.
• Raise the vehicle using a jack and secure with jack stands if needed.

2. Inspect and Replace Transmission Fluid

• Fluid Inspection:
  • Remove the transmission fluid dipstick (if applicable) and check the fluid level; add fluid if low.
  • Assess the fluid condition; it should be clean and free of debris. If burnt or contaminated, proceed to replace.
• Fluid Replacement:
  • Drain the transmission fluid using a fluid extractor or drain plug.
  • Replace with manufacturer-recommended transmission fluid (refer to the owner's manual for specifications).
  • Refill the transmission fluid to the appropriate level.

3. Repair or Replace TCM

• Wiring Inspection:
  • Inspect the wiring harness connected to the TCM for damage or shorts; repair any damaged wires.
• TCM Replacement:
  • Disconnect the TCM wiring harness carefully.
  • Remove the TCM from its mounting location using the appropriate socket or wrench.
  • Install the new TCM in the reverse order, ensuring all connectors are secure.
  • Torque the TCM screws to manufacturer specifications (refer to service manual).

4. Reconnect and Reset

• Reconnect the vehicle battery.
• Clear the error codes using an OBD-II scanner.
• Perform a system reset as per manufacturer's guidelines.