how to fix the P0700 code on my Volkswagen Golf MK7 (2015-2019)

Solution

1. Preparation

• Gather tools: OBD-II scanner, multimeter, socket set, torque wrench, and fluid transfer pump.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Transmission Fluid

• Step 1: Locate the transmission dipstick or fill port.
• Step 2: Remove the dipstick or fill plug and check the fluid level. If low, add the correct type of transmission fluid (refer to the owner's manual for specifications).
• Step 3: If the fluid is dark, burnt, or contaminated, drain the transmission fluid using a fluid transfer pump.
• Step 4: Replace the transmission fluid with new fluid, ensuring it meets Volkswagen specifications.
• Tools Required: Fluid transfer pump, funnel.

3. Inspect Wiring and Connectors

• Step 1: Locate the TCM and inspect its connectors for corrosion or damage.
• Step 2: Use a multimeter to check for continuity in the wiring harness from the TCM to the transmission.
• Step 3: Repair or replace any damaged wiring or connectors as necessary.

4. Test and Replace Transmission Solenoids (if necessary)

• Step 1: Remove the transmission pan to access the solenoids (follow the specific procedure for your model regarding pan removal).
• Step 2: Disconnect the electrical connector from the solenoids.
• Step 3: Use a multimeter to test each solenoid for proper resistance according to the specifications.
• Step 4: If a solenoid is faulty, replace it with a new one, ensuring proper torque on the mounting bolts.

5. Reassemble and Reset Codes

• Step 1: Reinstall the transmission pan (if removed), ensuring a new gasket is used.
• Step 2: Reconnect the negative battery terminal.
• Step 3: Use the OBD-II scanner to clear any stored codes from the system.

6. Test Drive

• Step 1: Start the engine and allow it to reach operating temperature.
• Step 2: Test drive the vehicle to ensure smooth operation and that the check engine light remains off.