how to fix P0700 code on my Ram 1500 DT (2019-Present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Transmission Fluid Check

• Locate the transmission dipstick (if applicable).
• Remove the dipstick and wipe it clean.
• Reinsert the dipstick and check the fluid level; add the appropriate transmission fluid if low.
• If the fluid appears dark or smells burnt, consider a complete fluid change.

3. Inspect Wiring and Connectors

• Visually inspect all wiring harnesses and connectors leading to the TCM.
• Look for signs of fraying, corrosion, or loose connections.
• Repair or replace any damaged wires or connectors as needed.

4. TCM Testing

• Reconnect the battery and use an OBD-II scanner to access the TCM data.
• Check for proper voltage and ground signals at the TCM connector.
• If the TCM is found faulty, remove it by unscrewing the mounting bolts and disconnecting the harness.

5. TCM Replacement

• Install the new TCM by connecting the harness and securing it with bolts.
• Reconnect the battery and clear the codes using the scanner.

6. Final Check

• Recheck the fluid level and ensure it is at the correct level.
• Test drive the vehicle to verify that the transmission operates smoothly and that the check engine light does not return.