how to troubleshoot my Ram 1500 DT (2019-Present) ignition key fob not working?

Ram 1500 DT (2019-Present)

Error Codes

30 minutes to 1 hour

Time

medium

Difficulty

medium

Severity

3 min read

537 words

Problem Statement

Learn how to troubleshoot and fix a non-working key fob for your 2019-present Ram 1500 DT. Step-by-step guide with diagnostic steps and solutions.

Affected Component

Electrical

Estimated Time

30 minutes to 1 hour

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure the vehicle is in Park and the ignition is turned off before working on the key fob to avoid accidental starting.

Symptoms

•Key fob buttons unresponsive
•Vehicle does not recognize the key fob
•Key Fob Battery Low warning displayed on the dashboard
•Difficulty starting the vehicle
•Intermittent functionality of the key fob
•Distant or weak signal when attempting to unlock the doors

Diagnostic Steps

1
Check the battery level of the key fob using a multimeter.
2
Inspect the key fob for physical damage or wear.
3
Replace the battery in the key fob.
4
Reprogram the key fob to the vehicle.
5
Test the key fob's range and response after reprogramming.
6
Inspect the vehicle’s keyless entry receiver for faults.

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

•Small flathead screwdriver
•Multimeter
•OBD-II scanner

Parts Required

•Key fob battery (CR2032)

Related Faults

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Diagnostic Steps

1
Check the battery level of the key fob using a multimeter.
2
Inspect the key fob for physical damage or wear.
3
Replace the battery in the key fob.
4
Reprogram the key fob to the vehicle.
5
Test the key fob's range and response after reprogramming.
6
Inspect the vehicle’s keyless entry receiver for faults.

Solution

1. Preparation

Gather necessary tools: small flathead screwdriver, multimeter, new key fob battery (CR2032), and OBD-II scanner (if reprogramming is needed).
Ensure the vehicle is in a safe, well-lit area.

2. Battery Check

Use the multimeter to check the voltage of the key fob battery.
- If the voltage is below 3.0V, proceed to replace the battery.

3. Key Fob Battery Replacement

Use a small flathead screwdriver to gently pry open the key fob case.
Remove the old battery and dispose of it properly.
Insert the new battery (CR2032) with the positive (+) side facing up.
Reassemble the key fob case, ensuring it clicks back into place securely.

4. Reprogramming the Key Fob

Sit in the driver's seat with the key fob.
Insert the ignition key into the ignition and turn it to the "ON" position (do not start the engine).
Press and hold the "Unlock" button on the key fob for approximately 10 seconds.
While holding the "Unlock" button, press the "Panic" button once, then release both buttons.
Turn the key back to the "OFF" position and remove it from the ignition.
Test the key fob to ensure it functions properly.

5. Inspect the Keyless Entry Receiver (if necessary)

If the key fob still does not work, inspect the keyless entry receiver located under the dashboard.
Check for loose connections or visible damage.
If issues are found, the receiver may need replacement.