how to fix P0700 code in Tesla Model S Original (2012-2020)

Learn how to diagnose and fix P0700 transmission control malfunction in Tesla Model S (2012-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather tools and parts necessary for the repair.
• Ensure the vehicle is parked on a level surface and the parking brake is engaged.
• Disconnect the vehicle's 12V battery to prevent any electrical shorts.

2. Check and Replace Transmission Fluid

• Tools Required: Funnel, fluid catch pan, socket set, torque wrench
• Remove the transmission fluid drain plug and allow the fluid to drain completely into a catch pan.
• Inspect the drained fluid for contamination or burnt smell; if contaminated, replace with new fluid.
• Reinstall the drain plug and torque to manufacturer specifications.
• Using a funnel, refill the transmission with the appropriate type of transmission fluid (consult the owner’s manual for specifications).

3. Inspect and Repair Electrical Connections

• Reconnect the battery and inspect all related electrical connectors and wiring for signs of corrosion or damage.
• Clean any corroded connectors with electrical cleaner and reassemble securely.
• Replace any damaged wiring harnesses or connectors as needed.

4. Update Software

• Tools Required: OBD-II scanner, Laptop with appropriate software
• Connect the OBD-II scanner or laptop to the vehicle's diagnostic port.
• Check for available software updates and follow the manufacturer's instructions to update the vehicle’s software.

5. Replace Transmission Control Module (if necessary)

• Tools Required: Socket set, torque wrench
• Locate the TCM, which is typically mounted near the transmission.
• Disconnect the wiring harness from the TCM.
• Remove the TCM mounting bolts and carefully detach it from its position.
• Install the new TCM, ensuring it is securely fastened and all connections are reattached.