how to fix transmission codes P0730-P0799 on my Toyota Tacoma N300 (2016-Present)

Learn how to diagnose and fix transmission codes P0730-P0799 on your Toyota Tacoma N300. Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Park the vehicle on a flat surface and engage the parking brake.
• Disconnect the negative battery terminal.

2. Fluid Check and Replacement

• Check Fluid Level:
  • Remove the transmission dipstick and inspect fluid level.
  • Add appropriate ATF (Automatic Transmission Fluid) if low.
• Fluid Replacement:
  • Drain the old transmission fluid using a wrench on the drain plug.
  • Replace the transmission filter if necessary.
  • Refill with the recommended ATF as specified in the owner’s manual.

3. Inspect Wiring and Connectors

• Visual Inspection:
  • Remove the transmission cover or access panel if needed.
  • Check all wiring harnesses and connectors for signs of wear, fraying, or corrosion.
• Repair/Replace:
  • Repair any damaged wiring or replace connectors as necessary.

4. Transmission Range Sensor Adjustment

• Access the Sensor:
  • Locate the transmission range sensor on the transmission.
• Adjustment:
  • Loosen the mounting bolts and adjust the sensor to align with the gear selector.
  • Tighten the bolts to the manufacturer’s specified torque.

5. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear any existing transmission codes.
• Perform a test drive to ensure proper function and monitor for any reoccurring codes.