how to fix P0700 code on Toyota Highlander Fourth Generation (2020-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is off.
• Disconnect the battery to avoid electrical shock.

2. Inspect and Replace Transmission Fluid

• Tools Required: Transmission fluid pump, catch pan, funnel.
• Drain the existing transmission fluid using the drain plug.
• Inspect the fluid for discoloration or burning smell; if contaminated, proceed to replace it.
• Refill with manufacturer-recommended transmission fluid (refer to the owner's manual for specifications).

3. Repair or Replace Wiring/Connectors

• Tools Required: Multimeter, wire cutters, soldering iron (if needed).
• Visually inspect all wiring and connectors leading to the TCM.
• Use a multimeter to check for continuity and voltage; repair any damaged wires or connectors.
• If necessary, replace any frayed or damaged wiring.

4. Test and Replace Transmission Range Sensor

• Tools Required: Socket set, multimeter.
• Locate the transmission range sensor on the transmission.
• Disconnect the sensor and use a multimeter to test for resistance; compare with specifications.
• If the sensor is faulty, remove it using a socket set and install a new one, ensuring it is aligned correctly.

5. Reconnect Battery and Clear Codes

• Reconnect the battery terminals securely.
• Use the OBD-II scanner to clear the P0700 code and any additional codes.
• Start the engine and allow it to reach operating temperature.