A remote start that worked yesterday may suddenly stop responding, leaving you with a cold cabin or an idling car you cannot shut off from inside. If your Subaru Outback remote start not working is the problem, the cause may be a weak key-fob battery, a vehicle condition that blocks starting, or a connected-service issue.
This guide explains how to check the system safely, identify which remote-start setup your Outback uses, and decide when a dealer or qualified technician should help. Start with the simple checks before replacing parts or paying for a diagnostic visit.
Why Subaru Outback Remote Start Not Working Can Have Several Causes
Subaru Outbacks can use different remote-start systems, depending on model year, trim, equipment, and installed accessories. Some owners start the car with a separate remote, while others use the MySubaru app and an active connected-services plan.
The correct troubleshooting path depends on which system you have. Your owner’s manual and the vehicle’s equipment list can confirm the system and its operating instructions.
- Separate remote: Usually an accessory remote-start system with its own buttons and operating range.
- MySubaru app: Uses the vehicle’s connected-services hardware, cellular coverage, account access, and applicable subscription.
- Aftermarket system: May have its own remote, installation instructions, and safety interlocks.
Do not assume every Outback has the same remote-start feature or service terms. Check the instructions for your specific year and setup before trying reset steps or ordering a replacement remote.
Check These Conditions Before Troubleshooting Parts
Remote start only works when the vehicle meets the system’s safety requirements. If a required condition is not met, the car may ignore the request or start briefly and shut down.
Subaru’s owner information is the best source for exact requirements, which can vary by equipment and model year. Check these common conditions first:
- The vehicle is in Park, and the parking brake is set if the system requires it.
- All doors, the rear gate, and the hood are fully closed and latched.
- The ignition is off, and the key is not already inside the vehicle.
- The security alarm or immobilizer is not preventing the start request.
- The engine, battery, and other vehicle systems do not have a fault that blocks remote starting.
- The remote is within its operating range, or the vehicle has a usable cellular connection for app commands.
A door that looks shut may not have latched fully. Open and close each door and the rear gate, then check the hood latch area if the system still refuses the command.
Look at the instrument panel for warning lights or messages after starting the vehicle normally. A check-engine light, low-battery warning, or security indicator may point to a condition that needs diagnosis rather than a remote-start reset.
Identify Your Remote-Start System
Before testing the remote, identify whether your Outback relies on a key fob, the MySubaru app, or an accessory system. Each setup uses different signals and can fail for different reasons.
Use the owner’s manual, purchase documents, or the remote itself to identify the equipment. If the vehicle has an unfamiliar system, a Subaru retailer can check its original equipment and accessory records.
Separate Key-Fob Remote
A separate remote may have a dedicated start button or a button sequence printed in its instructions. The remote needs a working battery and a clear signal path to the vehicle.
Some systems require you to press a lock button before holding the start button. Follow the instructions for that particular remote rather than trying a sequence from another Subaru model.
MySubaru App Remote Start
App-based remote start sends a command through connected-services technology. It depends on your MySubaru account, the vehicle’s communication system, cellular coverage, and the services available for your vehicle.
Subaru’s current service offerings, trial periods, and plan terms can change. Check the MySubaru app or Subaru’s official connected-services information for your vehicle’s current eligibility and subscription status.
Dealer-Installed or Aftermarket System
Some Outbacks have an accessory or aftermarket remote-start unit. The original key fob, a separate remote, or a third-party app may operate that system.
Use the installer’s instructions to find its button sequence and status indicators. If the unit stopped working after a battery replacement, alarm repair, or electrical service, ask the installer to check its wiring and programming.
Fix a Key-Fob Remote That Gets No Response
If the remote’s lights do not turn on or the vehicle does not react, begin with the battery and signal range. A weak fob battery can cause intermittent operation before the remote stops responding altogether.
Use the battery type listed in the remote’s instructions. Avoid guessing, since different remotes may use different batteries and opening the case incorrectly can damage its clips or circuit board.
- Test the remote close to the vehicle. Stand near the driver’s door and try the documented button sequence. If it works nearby but not farther away, range or interference may be the problem.
- Check the remote battery. Replace it with the specified type, keeping the battery orientation correct. Handle the circuit board carefully and avoid touching its contacts more than needed.
- Try the spare remote. If the spare works, the first remote may have a depleted battery, damaged buttons, or a failed transmitter.
- Inspect for damage. Look for a cracked case, stuck button, corrosion, or signs of water exposure. A damaged remote may need professional repair or replacement.
- Test the vehicle’s normal key operation. If the key also fails to lock or unlock the doors, the issue may involve the vehicle battery, receiver, or security system.
Nearby radio interference can reduce remote range. Test the fob in a different parking spot, away from other electronic devices or buildings that may block its signal.
If the remote locks and unlocks the doors but will not start the engine, the fob may be sending a signal correctly. Check the vehicle’s safety conditions and system status next.
Troubleshoot MySubaru App Remote Start
An app command can fail even when the vehicle itself is in good condition. The app needs the right account, an active eligible service, and a connection between the vehicle and Subaru’s connected-services network.
Check each part of that connection before assuming the starter or engine has failed. A pending command or error message in the app may also reveal the reason.
- Confirm the correct vehicle is selected. If your account includes more than one Subaru, verify that the app is sending the request to the Outback you are near.
- Check your account and service status. Sign in again if needed and review the connected-services plan shown in the app. Confirm the vehicle remains enrolled and eligible.
- Check phone connectivity. Make sure the phone has internet access. Weak cellular or Wi-Fi service can prevent the app from sending a request.
- Check the vehicle’s location. A garage, underground parking area, or remote location may have poor cellular reception. Try again where the vehicle can receive a signal.
- Update and restart the app. Install an available app update, close and reopen the app, and sign out and back in if the problem continues.
- Read the app’s message. A notice about a door, hood, ignition, or service condition can guide your next check.
Do not send repeated commands while the first request remains pending. Wait for the app to report a result, then check the vehicle from a safe distance before trying again.
If the app reports success but the engine has not started, check whether the vehicle received the request. Persistent communication errors may require Subaru connected-services support or a dealer inspection of the telematics system.
Understand Why Remote Start May Start and Then Stop
A remote-start system may start the engine and then shut it off when a safety condition changes or the system detects a fault. This behavior can differ from a system that never receives the command.
Observe what happens and note any dashboard messages. That information can help distinguish a vehicle interlock from a remote-control problem.
- The engine never starts: Check remote range, fob battery, app connection, and whether the vehicle accepted the command.
- The engine starts, then stops quickly: Check for an open door, hood, or rear gate, and review the manual’s shutdown rules.
- The engine starts, but the cabin does not warm or cool: Check the climate-control settings and the system’s instructions for preconditioning.
- The engine runs, but the app cannot stop it: Move to a safe place and use the vehicle’s normal controls if accessible. Contact support if the app remains unresponsive.
- The system behaves differently after service: Ask the shop to check whether a battery disconnect, alarm repair, or programming change affected the remote-start unit.
Many remote-start systems shut the engine off when someone enters the vehicle without following the required key and ignition procedure. Check the manual before attempting to drive away after a remote start.
Compare Common Symptoms and Next Steps
The symptom often points to the system that needs attention. Use this table to choose a sensible next check, not as a substitute for the instructions for your model year.
Stop testing if you smell fuel, see smoke, hear unusual mechanical noise, or notice a serious warning. Have the vehicle inspected instead of repeatedly attempting remote starts.
| Symptom | Likely area to check | Next step |
|---|---|---|
| Fob light does not respond | Fob battery or damage | Replace the specified battery or test the spare remote |
| Locks work, remote start does not | Safety interlock or starting condition | Check Park, doors, hood, and warning lights |
| App command stays pending | Phone, cellular signal, account, or service | Check connectivity and service status, then retry once |
| Engine starts then shuts down | Safety condition or system rule | Read the manual and check latches and messages |
| Neither remote nor normal start works | Vehicle battery, ignition, or engine fault | Arrange a vehicle diagnosis |
Know When to Contact a Subaru Dealer
Home checks can rule out simple causes, but some faults need diagnostic equipment. A Subaru retailer or qualified automotive technician can inspect the vehicle’s battery, security system, remote receiver, and stored diagnostic codes.
Contact a professional if the remote still fails after you check its battery and operating conditions. Bring both remotes, note the exact symptom, and record any warning message or recent repair.
- The engine will not start normally, or the dashboard shows a powertrain or security warning.
- The remote works intermittently after you install a fresh, correct battery.
- The app shows an active command but the vehicle does not respond in an area with good cellular service.
- The problem began after electrical work, a battery replacement, collision repair, or alarm installation.
- You see damaged wiring, corrosion, or signs of water inside a remote or vehicle component.
A technician may need to test the vehicle battery under load and scan relevant control modules. Ask for the diagnostic findings before approving parts replacement, since a failed remote, a vehicle fault, and a connected-service issue require different repairs.
For an aftermarket system, contact the installer or the manufacturer’s support team. A Subaru dealer may not have the programming tools or documentation for a third-party unit.
Prevent Future Remote-Start Problems
Regular checks can reduce preventable remote-start failures. Keep the remote in good condition and follow the system’s operation and storage instructions.
These habits also make it easier to spot a change before the system stops working completely:
- Replace the fob battery when its range drops or the remote responds inconsistently.
- Keep the remote dry and avoid storing it where its buttons can stay pressed.
- Keep doors, the rear gate, and hood latches clean and working properly.
- Check MySubaru service status and app access if you rely on app commands.
- Note how the system behaves after maintenance or a vehicle battery change.
- Use remote start outdoors, following the owner’s manual and local rules about idling.
Remote start does not replace safe vehicle use. Never start the engine in an enclosed garage, where exhaust can build up and create a carbon monoxide hazard.
Getting Your Subaru Outback Remote Start Working Again
Start by identifying the remote-start system and checking the vehicle’s safety conditions. Then test the fob battery or app connection, and note whether the car ignores the request or starts and shuts down.
If normal starting also fails, or the system continues to malfunction after these checks, arrange a professional diagnosis. The right fix depends on whether the problem lies with the remote, the vehicle, or connected services.
Frequently Asked Questions
Can a Low Car Battery Stop Subaru Remote Start?
Yes. A weak 12-volt battery can prevent the vehicle from meeting its starting requirements, even if the remote still locks the doors. If the engine also cranks slowly or dashboard lights dim, have the battery and charging system tested rather than focusing only on the remote.
Does Subaru Remote Start Need a Subscription?
App-based remote start may require an eligible connected-services plan, depending on the Outback’s model year and equipment. Plan details can change, so check the MySubaru app or Subaru’s official connected-services information for your vehicle. A separate accessory remote may follow different terms.
Why Does My Subaru Remote Start Work Only Sometimes?
Intermittent operation can result from a weak fob battery, changing signal range, poor cellular reception, or a door or hood that does not latch consistently. Note where the failure happens and whether the app or remote displays an error. Repeated failures after basic checks call for diagnosis.
Can I Start My Subaru Outback with the Key Fob?
That depends on the vehicle’s equipment and the remote-start system installed. Some Outbacks use a separate accessory remote, while others support app-based commands. Check the owner’s manual and the instructions for your specific remote before trying a button sequence.
Will Remote Start Work If the Check-Engine Light Is On?
It may not. A fault can cause the vehicle to block remote starting, and the result depends on the system and the problem detected. Read any dashboard message and arrange a diagnostic scan if the warning remains on. Do not clear a warning just to try remote start.