how to fix a Ram 1500 DT (2019-Present) that won't remote start

Ram 1500 DT (2019-Present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

531 words

Problem Statement

Learn how to diagnose and fix remote start issues in the 2019 Ram 1500 DT. Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems to prevent short circuits.

Symptoms

•Remote start function does not activate when the button is pressed
•No response from the vehicle (lights do not flash, engine does not start)
•Check engine light illuminated (if applicable)
•Security indicator light flashing on the dashboard
•Weak or dead key fob battery

Diagnostic Steps

1
Check the key fob battery for corrosion or weak charge.
2
Verify that the vehicle is in a suitable environment for remote start (e.g., doors closed, hood closed).
3
Scan for error codes using an OBD-II scanner to check for issues related to the remote start system.
4
Inspect the vehicle's security system and ensure that it is not preventing remote start (e.g., check for any active security alerts).
5
Test the remote start function with a spare key fob, if available.

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
•Small flat screwdriver
•Multimeter

Parts Required

•Key fob battery (CR2032 or as specified)

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Diagnostic Steps

1
Check the key fob battery for corrosion or weak charge.
2
Verify that the vehicle is in a suitable environment for remote start (e.g., doors closed, hood closed).
3
Scan for error codes using an OBD-II scanner to check for issues related to the remote start system.
4
Inspect the vehicle's security system and ensure that it is not preventing remote start (e.g., check for any active security alerts).
5
Test the remote start function with a spare key fob, if available.

Solution

1. Preparation

Gather required tools and parts.
Ensure the vehicle is parked safely and is in a well-ventilated area.
Disconnect the negative battery terminal to prevent any electrical issues.

2. Key Fob Battery Replacement

Remove the key fob cover using a small flat screwdriver.
Take out the old battery and note the orientation.
Insert a new battery (CR2032 or as specified) in the same orientation.
Reassemble the key fob and test the remote start function.

3. Inspect Remote Start System

Reconnect the negative battery terminal.
Use an OBD-II scanner to check for any codes related to the remote start system.
If codes are present, refer to the specific code for further diagnostics.
Clear the codes and test the remote start again.

4. Security System Check

Ensure that all doors, the hood, and the tailgate are securely closed.
If the security system is armed, disarm it using the key fob.
Test the remote start functionality again.

5. Reprogram Key Fob (if necessary)

If the key fob is not recognized, perform the following:
- Insert the key into the ignition and turn it to the "ON" position (do not start the engine).
- Press and hold the "lock" button on the key fob for 10 seconds.
- Turn the key to "OFF" and remove it.
- Test the remote start function once more.