how to diagnose P0730 code on Tesla Model S Plaid/Refresh (2021-present)

Learn how to diagnose and fix P0730 transmission issues in Tesla Model S Plaid. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

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

2. Check Transmission Fluid

• Tools Required: Transmission fluid dipstick or gauge.
• Remove the transmission dipstick and check fluid level:
  • If low, top off with the manufacturer-recommended transmission fluid.
  • Inspect fluid condition: If burnt or contaminated, proceed to fluid replacement.

3. Inspect and Repair Wiring

• Tools Required: Multimeter, electrical connectors.
• Visually inspect wiring to the transmission control module:
  • Use a multimeter to test for continuity in the wiring.
  • Repair or replace any damaged wires or connectors.

4. Test Transmission Range Sensor

• Tools Required: Multimeter.
• Disconnect the sensor connector and test:
  • Measure resistance across the terminals according to the service manual specifications.
  • Replace the sensor if it is out of specifications.

5. Replace Transmission Fluid (if necessary)

• Tools Required: Socket set, fluid pump, transmission fluid.
• Drain the old transmission fluid:
  • Remove the drain plug and allow fluid to completely drain.
• Replace with new fluid:
  • Install the drain plug and refill with the correct type and quantity of transmission fluid using a fluid pump.

6. Clear Codes and Perform Road Test

• Tools Required: OBD-II scanner.
• Use the OBD-II scanner to clear the P0730 code:
  • Monitor for any reoccurrence of the code during a road test.
  • Test drive the vehicle to ensure proper shifting and performance.