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

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, transmission fluid, funnel, multimeter, safety glasses, gloves.
• Ensure the vehicle is on a level surface; engage the parking brake.
• Disconnect the battery to avoid electrical shorts during repairs.

2. Inspect and Replace Transmission Fluid

1. Check Fluid Level:
   • Locate the transmission dipstick (if equipped) and remove it to check fluid level.
   • Add transmission fluid if low, ensuring you use the correct type (refer to owner’s manual).
2. Replace Fluid (if contaminated):
   • Remove the transmission drain plug and let old fluid drain into a container.
   • Replace the drain plug and refill with new transmission fluid through the dipstick tube or designated fill point.

3. Repair or Replace Wiring and Connectors

1. Inspect Wiring:
   • Examine wiring harness leading to the TCM for frays or exposed wires.
   • Use a multimeter to check for continuity and proper voltage.
2. Repair/Replace:
   • Repair any damaged wiring or corrosion found in connectors. Replace connectors if necessary.

4. Check and Replace the TCM (if faulty)

1. Test TCM:
   • Use the OBD-II scanner to monitor TCM performance; check for any abnormal readings.
2. Remove TCM:
   • Disconnect the battery. Remove the TCM from its mounting bracket and disconnect the wiring harness.
3. Install New TCM:
   • Connect the new TCM and secure it in place. Reconnect the battery.

5. Clear Codes and Test Drive

1. Clear Error Codes:
   • Use the OBD-II scanner to clear the P0700 code and any related codes.
2. Test Drive:
   • Take the vehicle for a test drive to ensure the transmission operates smoothly and that no new codes appear.