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

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

Solution

1. Preparation

• Gather necessary tools and parts.
• Park the vehicle on a level surface and engage the parking brake.
• Disconnect the negative terminal of the 12V battery for safety.

2. Inspect Transmission Fluid

• Tools Required: Transmission fluid dipstick or gauge (if applicable), clean rags.
• Remove the dipstick or access point for the transmission fluid.
• Check the fluid level and condition. If the fluid is dark or has a burnt smell, it may need to be changed.
• If low, top off with the manufacturer-recommended transmission fluid.

3. Check Wiring and Connectors

• Tools Required: Multimeter, wiring diagram.
• Visually inspect the wiring harness connected to the transmission control module.
• Use the multimeter to check for continuity and resistance in the wiring.
• Repair or replace any damaged wiring or connectors.

4. Test and Replace Transmission Control Module (if necessary)

• Tools Required: Multimeter, specialized TCM programming tool.
• Use the multimeter to check the voltage input and output from the TCM.
• If the module is faulty, remove the TCM by unscrewing it from its mounting bracket.
• Install a new TCM by reversing the removal process and ensure it is properly secured.
• Program the new TCM according to manufacturer specifications.

5. Reconnect Battery and Clear Codes

• Reconnect the negative terminal of the battery.
• Use the OBD-II scanner to clear the P0701 code and any related codes.
• Start the vehicle and conduct a test drive to ensure proper function.