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

Ram 1500 DT (2019-Present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

Error Code: P0700

3 min read

588 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix P0700 transmission control system malfunction in Ram 1500 DT. Step-by-step guide with diagnostic procedures and repair instructions.

Error Code

P0700

Affected Component

Transmission

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the engine to cool before opening any components related to the transmission.

Symptoms

•Check engine light illuminated
•Transmission slipping or erratic shifting
•Poor acceleration or loss of power
•Delayed engagement when shifting from park to drive
•Transmission overheating or unusual noises

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to confirm P0700 and check for any additional related codes.
2
Inspect the transmission fluid level and condition; ensure it is at the proper level and not burnt or contaminated.
3
Check the TCM connectors and wiring for damage, corrosion, or loose connections.
4
Perform a visual inspection of the transmission for any visible leaks or damage.
5
Test the transmission range sensor (neutral safety switch) for proper operation.
6
Verify the condition of the vehicle’s battery and charging system, as low voltage can affect TCM operation.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Multimeter
•Socket set
•Transmission fluid pump
•Fluid catch pan
•Electrical contact cleaner

Parts Required

•Transmission fluid (ATF+4)
•Transmission filter
•Transmission range sensor (if needed)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to confirm P0700 and check for any additional related codes.
2
Inspect the transmission fluid level and condition; ensure it is at the proper level and not burnt or contaminated.
3
Check the TCM connectors and wiring for damage, corrosion, or loose connections.
4
Perform a visual inspection of the transmission for any visible leaks or damage.
5
Test the transmission range sensor (neutral safety switch) for proper operation.
6
Verify the condition of the vehicle’s battery and charging system, as low voltage can affect TCM operation.

Solution

1. Preparation

Gather necessary tools and parts.
Park the vehicle on a flat surface and set the parking brake.
Disconnect the battery to ensure safety while working on electrical components.

2. Check and Replace Transmission Fluid

Sub-steps:
1. Remove the transmission fluid dipstick and check fluid level.
2. If fluid is low, add the recommended type of transmission fluid (typically ATF+4 for Ram).
3. If fluid is contaminated, drain the transmission fluid by removing the drain plug.
4. Replace the filter and refill the transmission with fresh fluid to the correct level.
Tools Required: Transmission fluid pump, socket set, fluid catch pan.
Safety Warnings: Ensure the vehicle is cool before handling transmission components.

3. Inspect and Repair Electrical Connections

Sub-steps:
1. Locate the TCM and inspect its wiring harness and connectors for damage or corrosion.
2. Clean any corrosion with electrical contact cleaner and reconnect securely.
3. If any wires are damaged, repair or replace them as necessary.
Tools Required: Multimeter, electrical contact cleaner.

4. Test and Replace Transmission Range Sensor (if necessary)

Sub-steps:
1. Locate the transmission range sensor and disconnect the wiring harness.
2. Use a multimeter to test the sensor's resistance according to the specifications.
3. If out of spec, remove and replace the sensor with a new one.
4. Reconnect the wiring harness and ensure it is secure.
Tools Required: Multimeter, socket set.

5. Reconnect Battery and Clear Codes

Reconnect the vehicle’s battery.
Use the OBD-II scanner to clear the P0700 code and any other related codes.
Test drive the vehicle to ensure the issue is resolved.