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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to prevent any electrical shorts.
• Ensure the vehicle is on a level surface and safely supported.

2. Check and Change Transmission Fluid

• Tools Required: Transmission fluid pump, socket set, fluid catch pan
• Sub-steps:
  1. Locate the transmission dipstick or fill plug.
  2. Remove the plug and check the fluid level using a dipstick.
  3. If fluid is low, add the manufacturer's recommended transmission fluid.
  4. If fluid is dirty (dark or has a burnt smell), drain the fluid using a catch pan and replace it with fresh fluid.
  5. Reinstall the fill plug and ensure it is tightened to the manufacturer's specifications.

3. Inspect and Repair Wiring and Connectors

• Tools Required: Multimeter, wire brush
• Sub-steps:
  1. Visually inspect the wiring harness connected to the transmission for fraying, corrosion, or breaks.
  2. Use a multimeter to test for continuity and voltage at the connectors.
  3. Clean any corrosion with a wire brush and apply dielectric grease to prevent future corrosion.
  4. Repair or replace damaged wiring as necessary.

4. Replace Transmission Range Sensor (if faulty)

• Tools Required: Socket set, torque wrench
• Sub-steps:
  1. Locate the transmission range sensor on the transmission.
  2. Disconnect the electrical connector.
  3. Remove the mounting bolts securing the sensor and take it out.
  4. Install the new transmission range sensor, ensuring it is properly aligned.
  5. Torque the mounting bolts to the manufacturer's specifications.
  6. Reconnect the electrical connector.

5. Reprogram or Reset TCM (if required)

• Tools Required: OBD-II scanner with programming capability
• Sub-steps:
  1. Connect the OBD-II scanner to the vehicle's diagnostic port.
  2. Navigate to the TCM settings and select the option to reset or reprogram the module.
  3. Follow the on-screen instructions to complete the process.
  4. Disconnect the scanner after completion.