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

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the vehicle battery to prevent electrical shorts while working on the transmission system.

2. Inspect and Replace Transmission Fluid

• Tools Required: Socket set, transmission fluid pump, drain pan
• Remove the transmission fluid drain plug and allow fluid to drain into the pan.
• Replace the drain plug and torque to manufacturer specifications (consult repair manual for exact torque value).
• Refill the transmission with the recommended type and amount of fluid (consult owner's manual for specifications).

3. Repair Wiring and Connectors

• Tools Required: Multimeter, wire crimpers, soldering iron (if necessary)
• Visually inspect the wiring harness connected to the TCM and transmission for any signs of wear or damage.
• Use a multimeter to test continuity and check for shorts in the wiring.
• Repair any damaged wires by cutting and splicing or replacing connectors as necessary.

4. Replace Transmission Control Module (if necessary)

• Tools Required: OBD-II scanner, socket set, torque wrench
• If diagnostics indicate a failure in the TCM, remove the old module by unscrewing it from its mount.
• Disconnect the wiring harness from the TCM.
• Install the new TCM by connecting the wiring harness and securing it in place.
• Reconnect the battery and clear any stored codes with an OBD-II scanner.

5. Final Checks

• Tools Required: OBD-II scanner
• After completing repairs, check all connections and ensure the transmission fluid is at the correct level.
• Start the vehicle and allow it to reach operating temperature.