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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the vehicle's battery to prevent electrical shock.
• Ensure the vehicle is on a level surface and secure it with wheel chocks.

2. Fluid Check and Replacement

• Sub-steps:
  1. Locate the transmission dipstick or fill port.
  2. Remove the dipstick, wipe it clean, and reinsert it to check the fluid level.
  3. If the fluid is low, add the recommended transmission fluid (consult the owner's manual for specifications).
  4. If the fluid is dirty or has a burnt smell, proceed to replace it.
     • Drain the old fluid by removing the transmission pan bolts and lowering the pan carefully.
     • Replace the transmission filter if applicable.
     • Clean the pan and re-install with a new gasket.
     • Refill with the appropriate transmission fluid.

3. Inspect and Repair Electrical Connections

• Sub-steps:
  1. Locate the TCM and disconnect the wiring harness.
  2. Inspect the pins for corrosion or damage. Clean or replace as necessary.
  3. Reconnect the wiring harness securely.
  4. If any wiring is damaged, repair or replace the affected sections.

4. Test Transmission Solenoids

• Sub-steps:
  1. Access the transmission solenoids by removing the transmission pan if not already done.
  2. Disconnect the electrical connectors from the solenoids.
  3. Use a multimeter to check resistance according to specifications (refer to service manual).
  4. Replace any solenoids that do not meet specifications.

5. Reassemble and Reconnect Battery

• Reinstall the transmission pan and torque bolts to manufacturer's specifications.
• Reconnect the vehicle's battery.