how to fix P0700 transmission code in my BMW 5 Series F10/F11 (2010-2017)

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the battery to prevent electrical shorts.

2. Check and Replace Transmission Fluid

• Tools: Transmission fluid pump, funnel, container for old fluid.
• Remove the transmission fluid drain plug and allow fluid to drain completely into the container.
• Inspect the old fluid for discoloration or burnt smell.
• Reinstall the drain plug with a new gasket if necessary.
• Using a fluid pump, refill the transmission with the correct type of fluid as specified by the manufacturer (usually ATF).

3. Inspect and Repair Wiring

• Tools: Multimeter, wire strippers, soldering iron (if necessary).
• Locate the wiring harness connected to the TCM.
• Use the multimeter to check for continuity in the wires.
• Repair or replace any damaged wiring or connectors as required.

4. Replace Transmission Solenoids (if faulty)

• Tools: Socket set, torque wrench, screwdriver.
• Remove the transmission pan by unscrewing the bolts and gently prying it off.
• Clean the old gasket material from the pan and the transmission surface.
• Locate the solenoids and remove them from their mounting positions.
• Install new solenoids and torque to manufacturer specifications.
• Reinstall the transmission pan with a new gasket and torque the bolts to specification.

5. Reconnect Battery and Test

• Reconnect the battery.
• Start the vehicle and check for leaks.
• Perform a test drive to ensure smooth operation and confirm that the P0700 code does not return.