Subaru Remote Start How To: Complete Guide For Starlink And Key Fob Systems

Remote starting a Subaru involves two distinct methodologies: using the physical key fob for short-range line-of-sight activation or utilizing the MySubaru mobile application for long-range telematics-based ignition. Achieving successful operation requires an active Starlink subscription for digital methods, while physical key fob remote start functions are contingent upon factory-installed hardware packages or dealer-installed accessory kits.

Prerequisites for Subaru Remote Engine Operation

Before attempting to engage the remote start feature, confirm the hardware and software status of your vehicle. The availability of these features depends heavily on the specific trim level, model year, and the presence of a compatible telematics control module.

• Essential Equipment:
  
  
  • A factory-issued key fob with the dedicated remote start button (usually denoted by a curved arrow icon).
  • An active MySubaru account linked to your vehicle's Vehicle Identification Number (VIN).
  • A functional Starlink Safety and Security subscription for app-based remote features.
• Prerequisite Knowledge:
  
  
  • Ensure your Subaru is parked in a well-ventilated area, such as an open driveway or detached garage; never operate remote start in an enclosed space due to carbon monoxide accumulation.
  • Verify that the vehicle's hood, doors, and trunk are fully latched and closed.
  • Confirm that the vehicle has a sufficient fuel level, typically above the reserve threshold, as many electronic control units will disable remote starting if the low-fuel light is active.
• Time and Cost Benchmarks:
  
  
  • Setup Time: 10 to 20 minutes for mobile app synchronization.
  • Subscription Cost: Varies by region, typically requiring a monthly or annual commitment for Starlink services.

Operating the Subaru Remote Start System

The activation process differs significantly between the short-range key fob method and the long-range mobile application method. Follow these procedures carefully to ensure the ignition sequence initializes correctly.

Step 1: Key Fob Activation Protocol

The key fob remote start operates on a proprietary short-range radio frequency. To initiate, identify the remote start button, which is usually independent of the lock and unlock functions.

1. Press the lock button on your key fob once.
2. Within two seconds of pressing the lock button, press and hold the remote start button (the button with the circular arrow icon) for at least three seconds.
3. Observe the key fob light; it should blink or change color to indicate that the signal has been successfully transmitted to the vehicle’s Body Control Module (BCM).
4. The vehicle’s hazard lights will flash, and the horn may chirp once to confirm the engine has started.

Pro-Tip: If your key fob fails to start the vehicle, ensure you are within a 30 to 50-foot radius. Obstructions like thick walls or heavy metal structures can significantly attenuate the radio signal, preventing the BCM from receiving the command.

Step 2: MySubaru App Configuration

For remote starting via smartphone, the vehicle must be registered in the MySubaru portal.

1. Log into the MySubaru application on your mobile device.
2. Navigate to the Remote Services tab located in the bottom dashboard menu.
3. Select the Engine icon.
4. Input your pre-defined four-digit remote security PIN.
5. The application will send an encrypted request to the Subaru telematics server, which then relays the start command to the vehicle’s cellular modem.
6. Wait approximately 10 to 30 seconds for the application to confirm the engine status.

Warning: Do not leave children, pets, or individuals requiring assistance inside the vehicle during a remote start sequence, as the cabin climate control will default to the last set temperature, which may lead to heatstroke or hypothermia depending on ambient conditions.

Step 3: Entering the Vehicle Post-Remote Start

Once the engine is running, the vehicle enters a security-locked state.

1. Unlock the vehicle using the fob or the door handle sensor.
2. Enter the vehicle and depress the brake pedal while pressing the Start/Stop button (for Push-Button Start models).
3. The electronic steering column lock will release, and the vehicle will transition from "Remote Start Mode" to "Drive Mode."
4. If you enter the vehicle without pressing the Start/Stop button while holding the brake, the engine will automatically shut off as a theft-deterrent measure.

Technical Specifications and Compatibility Matrix

Troubleshooting Common Remote Start Failures

Even with a perfectly configured system, external factors or internal logic gates can prevent the engine from turning over. Review these scenarios to resolve common operational issues.

• Root Cause: Security Interlocks. If the vehicle’s hood, trunk, or doors are even slightly ajar, the BCM will refuse the start command to prevent unauthorized engine operation.
  
  
  • Actionable Fix: Perform a physical walkthrough of the vehicle to ensure all latches are fully clicked into the secondary locking position.
• Root Cause: Check Engine Light (CEL). If the vehicle’s On-Board Diagnostics (OBD-II) system detects a fault code, the remote start feature is automatically disabled to protect the drivetrain.
  
  
  • Actionable Fix: Check the dashboard for an illuminated Check Engine icon; if present, the vehicle must be inspected by a certified technician before remote start capabilities are restored.
• Root Cause: Low Battery Voltage. If the key fob battery is depleted, or if the car battery has dropped below a specific cranking voltage threshold, the ignition sequence will fail.
  
  
  • Actionable Fix: Replace the CR2032 battery in the key fob or check the vehicle’s 12V lead-acid battery state-of-charge if the vehicle has been sitting for an extended period.

Frequently Asked Questions

Why does my Subaru shut off when I open the door?

This is a standard safety and anti-theft feature. Subaru programming requires the driver to verify their identity and possession of the key fob by depressing the brake pedal and engaging the ignition button before the car allows the transmission to shift out of Park.

Can I remote start my Subaru if I do not have a Starlink subscription?

You can only use the physical key fob remote start feature without a subscription, provided the vehicle was manufactured with the remote start accessory hardware installed. The MySubaru mobile application requires an active Starlink Safety and Security subscription for telematics data transfer.

What is the maximum duration the engine will run via remote start?

For safety and fuel efficiency, the engine will automatically shut off after 10 minutes. You can extend this for one additional 10-minute cycle via the MySubaru app, but the engine must be restarted manually after the total 20-minute limit is reached.

Can I change the climate control settings via the mobile app?

Yes, within the MySubaru app, you can often adjust the temperature, seat heaters, and defroster settings before or during the remote start session, allowing the cabin to reach your desired comfort level before you enter the vehicle.

Ensure your vehicle remains in peak operating condition by scheduling regular maintenance with your local authorized service center. Consistent software updates and battery health checks are the most effective ways to maintain reliable remote start performance.