how to fix P0700 transmission code in BMW 5 Series G30/G31 (2017-2024)

Solution

1. Preparation

• Tools Required: OBD-II scanner, multimeter, socket set, torque wrench, transmission fluid, fluid pump.
• Gather required parts and ensure the vehicle is on a flat surface with the engine off.

2. Check and Replace Transmission Fluid

1. Access the Transmission Pan:
   • Raise the vehicle securely using jack stands.
   • Remove any panels obstructing access to the transmission pan.
2. Drain Old Fluid:
   • Position a fluid catch pan under the transmission pan.
   • Remove the pan's drain plug or bolts and allow the old fluid to drain completely.
3. Inspect the Pan and Filter:
   • Remove the transmission pan completely and inspect for metal shavings or debris.
   • Replace the internal filter if applicable, following manufacturer specifications.
4. Install New Transmission Fluid:
   • Clean the pan and its gasket surface. Replace the gasket if necessary.
   • Reinstall the transmission pan with new bolts, applying the manufacturer's torque specifications.
   • Using a fluid pump, fill the transmission with the specified type and amount of new fluid.

3. Reset Transmission Control Module

1. Reconnect Battery:
   • Disconnect the negative terminal of the battery for at least 15 minutes to reset the TCM.
   • Reconnect the battery terminal and ensure all connections are secure.
2. Clear Fault Codes:
   • Reconnect the OBD-II scanner and clear the P0700 code and any associated codes.

4. Test Drive and Monitor

• Start the vehicle and allow it to reach operating temperature.
• Perform a test drive to assess shifting quality and monitor for any return of the P0700 code.