Why would my remote start stop working?

If your remote start has suddenly stopped working, there could be a few potential reasons behind it. In this article, we'll explore the common causes and provide guidance on troubleshooting and resolving the issue.

Common Reasons for Remote Start Failure

There are several factors that can contribute to a remote start system no longer functioning as expected. Some of the most common reasons include:

• Dead or low battery in the remote key fob: The remote key fob needs a working battery to communicate with the vehicle's remote start system. If the battery is dead or low, the remote won't be able to send the start signal.


• Loose or disconnected wiring: The remote start system relies on a series of electrical connections to function properly. If any of the wiring becomes loose or disconnected, it can disrupt the system's operation.


• Malfunctioning remote start module: The remote start module is the brain of the system, and if it fails or becomes damaged, the remote start won't work.


• Incompatibility with vehicle: Some remote start systems may not be compatible with certain vehicle makes, models, or years. Improper installation or configuration can also cause compatibility issues.


• Immobilizer interference: The vehicle's anti-theft immobilizer system is designed to prevent the engine from starting without the correct key. If the remote start system interferes with the immobilizer, it can prevent the engine from starting remotely.

These are some of the most common reasons why a remote start system may stop working. It's important to identify the root cause to properly address the issue and restore the remote start functionality.

Troubleshooting and Resolving Remote Start Issues

If your remote start has stopped working, here are some steps you can take to troubleshoot and resolve the problem:

• Check the remote key fob battery: Replace the battery if it's dead or low. This is often the easiest and most common fix.


• Inspect the wiring: Visually inspect the wiring connections in the remote start system to ensure they are secure and undamaged. Tighten any loose connections or replace any damaged wires.


• Test the remote start module: If the wiring appears to be in good condition, the issue may be with the remote start module itself. You can have the module tested by a professional to determine if it needs to be repaired or replaced.


• Check for compatibility issues: Ensure that the remote start system is compatible with your specific vehicle make, model, and year. If it's not, you may need to install a different system that is compatible.


• Resolve immobilizer interference: If the remote start system is interfering with the vehicle's immobilizer, you may need to have the system reconfigured or reprogrammed by a professional to resolve the issue.

If you're unable to resolve the issue on your own, it's recommended to consult with a professional automotive technician or the remote start system manufacturer for further assistance.

Does remote start have its own fuse?

Usually it's under the driver dash somewhere. There will be a good amount of wires from a box the size of a drill battery or so. It could be hooked to a fuse in your car's normal fuse box, or have its own inline fuse that's hidden.

How do I get my remote start to work again?

To get your remote start working again, check the most common issues first: ensure the key fob batteries are charged or replaced, and verify all doors, the trunk, and the hood are fully closed. If the problem persists, try resetting the remote start system by disconnecting your car battery, checking for a disabled status due to safety features like an open hood or a check engine light, or reprogramming the fob. 
Initial checks
This video demonstrates how to check the hood pin switch, a common reason for remote start failure: 58sQuiteAlrightYouTube · Apr 21, 2024

• Remote fob battery: Replace the battery or, if it's a rechargeable remote, charge it. 
• Open/closed components: Make sure the hood is firmly closed and latched. The hood pin switch will disable the remote start if it thinks the hood is open. 
• Check engine light: If your check engine light is on, the remote start will not function as a safety feature. 
• Valet mode: Check if you've accidentally put the system in valet mode, which disables the remote start. The process to disable it varies by car, so consult your owner's manual. 
• Vehicle in park: Ensure the vehicle is in park. The remote start will not work if it's not. 

Resetting and reprogramming

• Reset the system: Try disconnecting your car's battery for about 10 minutes to reset the vehicle's computer. Be aware that this may reset other settings in your car. 
• Reprogram the remote: The method for reprogramming a key fob varies significantly by manufacturer. 
  • Check your owner's manual for the specific instructions. 
  • If you can't find the instructions, look online for your car's specific model, or check sites like The Drive for general tips. 
  • Some modern key fobs for newer cars can only be reprogrammed by a dealership. 

Other potential causes

• Blown fuse: Check the fuse box for any fuses related to the ignition or remote start system. 
• Loose or faulty connection: Aftermarket systems have a separate module with wires that could have come loose. Check the connection to the module, especially if the remote start was recently installed. 
• Tach signal: The vehicle may have lost the tach signal, which tells the remote start when the engine is running. This can happen if there's an issue with the vehicle's computer. 

This video explains how to fix issues with the Subaru remote start system: 1mADD is multitaskingYouTube · Dec 12, 2019

How do I reset my remote car starter?

Resetting Your Remote Starter
Grab all of your car's remote-start fobs. While in the driver's seat, close the driver's side door. Insert your ignition key and turn it to Accessory (or press the start button once without pushing the brake pedal). Press the Lock button on your remote car starter.

Why would my remote start suddenly stop working?

Remote start may have suddenly stopped working due to a dead key fob or car battery, an unlatched hood or door, or a check engine light being on. Other common causes include the vehicle not being in park, a malfunction in the hood pin switch, or the car being low on fuel. To troubleshoot, start with the simple checks: replace the key fob battery, ensure the hood and doors are shut, and check that the car is in park and has fuel. 
Simple checks

• Key fob battery: Replace the battery in your key fob. If other functions on the fob are also weak, this is the most likely cause. 
• Vehicle in park: Double-check that the gear selector is firmly in the "Park" position. 
• Doors, hood, and trunk: Ensure all doors, the trunk, and the hood are completely closed. A faulty hood pin switch can sometimes trick the car into thinking the hood is open, which will disable remote start. 
• Fuel level: Make sure the vehicle has enough fuel to start. 
• Check Engine Light: If the check engine light is on, the remote start will not work as a safety feature. You will need to have the issue diagnosed to clear the light. 
• Key in the car: Some systems are disabled if a key is inside the vehicle. 

You can watch this video to learn more about common remote start problems: 1mKurt of TradesYouTube · Nov 11, 2022
Advanced checks

• Car battery: A low vehicle battery can prevent the remote start from engaging. 
• Improper procedure: Try the remote start sequence again exactly as described in your owner's manual. Some systems require a specific number of presses or a short waiting period after locking the doors. 
• Too many attempts: Some systems will disable remote start after a certain number of failed attempts and require you to start the car with the key or push button to reset it. 
• Hazard lights: If your hazard warning lights are on, the remote start may not work. 

This video shows how to check the hood switch for issues: 58sQuiteAlrightYouTube · Apr 21, 2024
If it still doesn't work

• Consult the manual: Refer to your vehicle's owner's manual for specific instructions and troubleshooting steps, as systems can vary between models. 
• Diagnostic tools: If the above steps don't work, a mechanic may need to use a diagnostic scan tool to check for specific error codes in the system.