how to diagnose P0700 code on BMW 5 Series F10/F11 (2010-2017)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety while working on electrical systems.

2. Address Fault Codes

1. Clear the P0700 code using the OBD-II scanner.
2. Reconnect the battery and perform a test drive to see if the code reappears.

3. Inspect and Replace Transmission Fluid

1. Locate the transmission dipstick (if equipped) or the fill plug.
2. Remove the dipstick or fill plug and check fluid level; add fluid if low.
3. If the fluid is dark or smells burnt, proceed to change the transmission fluid.
4. Drain the old fluid by removing the drain plug, and replace it with new fluid specified by the manufacturer (usually a synthetic ATF).
5. Replace the drain plug and refill the transmission with the appropriate amount of new fluid.

4. Repair or Replace Faulty Components

1. Based on diagnostic findings, repair or replace any damaged wiring or connectors.
2. If additional codes indicate a specific component failure (e.g., solenoid or valve body), remove the transmission pan to access and replace the faulty part.
   • Drain the transmission fluid.
   • Remove the pan bolts and carefully detach the pan.
   • Replace the necessary components and reassemble with a new gasket.

5. Final Assembly

• Reinstall the transmission pan, ensuring all bolts are torqued to factory specifications.
• Reconnect any electrical connectors and ensure all wiring is secure.