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

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, multimeter, jack and jack stands, transmission fluid.
• Disconnect the negative battery cable to prevent electrical shorts.
• Allow the vehicle to cool down if it has been running.

2. Address Transmission Fluid Issues

• Sub-steps:
  1. Remove the transmission fluid dipstick and check the fluid level.
  2. If low, add the appropriate type of transmission fluid as per manufacturer specifications.
  3. If the fluid is dark or smells burnt, proceed to drain and replace the transmission fluid.
  4. Locate the transmission pan, remove the bolts, and carefully lower the pan to drain the old fluid.
  5. Replace the transmission filter if applicable, and reinstall the pan with a new gasket, torquing the bolts to manufacturer specifications.

3. Inspect and Repair Wiring

• Sub-steps:
  1. Inspect the wiring harness connected to the TCM for any signs of damage or corrosion.
  2. Use a multimeter to check for continuity and proper voltage at the TCM connector.
  3. Repair or replace any damaged wires or connectors as necessary.

4. Clear Error Codes

• Sub-steps:
  1. Reconnect the negative battery cable.
  2. Use the OBD-II scanner to clear the P0700 code and any other related codes.
  3. Perform a test drive to ensure the issue has been resolved.