how to fix BMW 3 Series F30/F31 (2012-2019) P0700 transmission code

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.

2. Transmission Fluid Change

• Tools Required: Socket set, fluid pump, torque wrench, transmission fluid (OEM specification).
• Remove the transmission fluid pan using a socket set.
• Allow old fluid to drain completely into a suitable container.
• Inspect the pan for debris and clean it thoroughly.
• Replace the transmission filter if applicable.
• Reinstall the pan and tighten bolts to the manufacturer’s torque specifications.
• Fill the transmission with new fluid using a fluid pump through the fill port.

3. Inspect and Repair Electrical Connections

• Tools Required: Multimeter, dielectric grease.
• Inspect the wiring harness connected to the TCM for any signs of fraying or corrosion.
• Use a multimeter to check the voltage at the TCM connector.
• Clean and apply dielectric grease to the connectors to prevent corrosion.
• Replace any damaged wiring.

4. Replace Transmission Range Sensor (if necessary)

• Tools Required: Socket set, torque wrench.
• Disconnect the electrical connector from the transmission range sensor.
• Remove the bolts securing the sensor and carefully take it out.
• Install the new sensor and secure it with bolts to the manufacturer's torque specifications.
• Reconnect the electrical connector.

5. Clear Codes and Test Drive

• Reconnect the battery.
• Use the OBD-II scanner to clear the P0700 and any other transmission codes.
• Test drive the vehicle to ensure proper operation of the transmission.