how to fix a P0700 code on my Tesla Model Y Current (2020-present)

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 negative battery terminal to ensure safety during repairs.

2. Check Transmission Fluid

• Tools Required: Transmission fluid dipstick, funnel
• Remove the transmission dipstick and check the fluid level. If low, add the manufacturer's recommended transmission fluid until the proper level is reached.
• Inspect the fluid for burning smell or dark color, which indicates the need for a fluid change.

3. Inspect TCM Connectors

• Tools Required: Socket set, multimeter
• Locate the TCM in the vehicle. Disconnect the wiring harness from the TCM.
• Visually inspect the connectors for corrosion or damage. Use a multimeter to check for continuity in the wiring.
• Clean the connectors with electrical contact cleaner and reconnect.

4. Update Software

• Tools Required: Tesla mobile app or vehicle's touchscreen
• Access the software update feature through the Tesla touchscreen.
• Ensure the vehicle is connected to Wi-Fi and download any available updates. Follow on-screen instructions to complete the update.

5. Test Transmission Range Sensor

• Tools Required: Multimeter
• Locate the transmission range sensor and disconnect it.
• Using a multimeter, test the sensor according to the manufacturer's specifications for resistance and voltage output.
• Replace the sensor if it does not meet specifications.

6. Reassemble and Reconnect Battery

• Reconnect all connectors and ensure everything is secured.
• Reconnect the negative battery terminal.
• Start the vehicle and ensure no warning lights are present.