how to fix Tesla Model S Plaid/Refresh (2021-present) check engine light P0700

Learn how to diagnose and fix P0700 transmission issue in Tesla Model S Plaid. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the ignition is turned off.
• Disconnect the negative battery terminal for safety.

2. Inspect and Repair Wiring

• Tools Required: Multimeter, wiring harness repair kit
• Inspect the wiring harness connected to the TCM for any signs of damage or corrosion.
• Use a multimeter to check for continuity in the wiring.
• Repair or replace any damaged sections of wiring as necessary.

3. Check and Replace Transmission Fluid

• Tools Required: Transmission fluid pump, fluid catch pan, funnel
• Remove the transmission fluid drain plug and allow fluid to drain into the catch pan.
• Inspect the old fluid for signs of contamination or burning.
• If necessary, replace with manufacturer-recommended transmission fluid (consult the owner's manual for specifications).
• Reinstall the drain plug and fill the transmission with the new fluid using the pump and funnel.

4. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal and ensure all connections are secure.
• Use the OBD-II scanner to clear the P0700 code from the vehicle's memory.

5. Test Drive the Vehicle

• Take the vehicle for a test drive to ensure the transmission operates smoothly and the check engine light remains off.