Experiencing a dead key fob and malfunctioning interior lights in your 2018 Subaru Outback can be frustrating. While it might seem like a major electrical issue, the cause is often simpler than you think. This comprehensive guide will walk you through common reasons behind a 2018 Subaru Outback inside light and key fob malfunction, empowering you with the knowledge to troubleshoot and potentially fix the issue yourself.
Common Culprits Behind the Issue
Several factors can contribute to both your interior lights and key fob failing simultaneously in your 2018 Subaru Outback. Here’s a breakdown of the most common causes:
1. Dead Key Fob Battery
The most frequent reason for a key fob failing is a depleted battery. Without power, your key fob can’t send the necessary signals to your Outback.
Signs Your Key Fob Battery is Dead:
- Reduced key fob range: You need to be very close to the vehicle for it to respond.
- Intermittent functionality: The key fob works sometimes but not others.
- No response at all: The car doesn’t lock, unlock, or start when using the key fob.
2. Faulty Fuse
Your Subaru Outback uses fuses to protect various electrical circuits, including those powering the interior lights and keyless entry system. A blown fuse can disrupt the flow of electricity, leading to malfunction.
Identifying a Blown Fuse:
- Check your owner’s manual for the fuse box location(s).
- Locate the specific fuses related to “Interior Lights,” “Keyless Entry,” or “Remote Keyless Entry.”
- Visually inspect the fuse for a broken wire or a darkened/melted appearance.
3. Weak Car Battery
While a weak car battery might not directly cause key fob issues, it can impact the vehicle’s electrical system, leading to unpredictable behavior, including malfunctioning interior lights.
Signs of a Weak Car Battery:
- Slow engine cranking
- Dim headlights, especially when idling
- Warning lights on the dashboard
- Clicking sound when turning the ignition
4. Programming Errors
Sometimes, a key fob might lose its programming, preventing it from communicating correctly with your Subaru Outback. This can happen after a battery change or due to electronic interference.
Signs of Key Fob Programming Errors:
- Key fob functions erratically
- Previously programmed settings on the key fob no longer work
- The vehicle doesn’t recognize the key fob at all
Subaru Outback Fuse Box
Troubleshooting Your Subaru Outback
Now that you’re familiar with the common causes, let’s dive into troubleshooting steps:
1. Replace the Key Fob Battery
- Consult your owner’s manual for the type of battery your key fob uses.
- Carefully open the key fob casing (usually with a small flathead screwdriver).
- Replace the old battery with a new one, ensuring correct polarity.
- Reassemble the key fob and test its functionality.
Replacing a Key Fob Battery
2. Inspect and Replace Fuses
- Locate the appropriate fuse box using your owner’s manual.
- With the engine off, carefully remove the fuse related to the interior lights or keyless entry using a fuse puller (often found inside the fuse box cover).
- If the fuse is blown, replace it with a new one of the same amperage.
- Reinstall the fuse box cover and test if the issue is resolved.
3. Test the Car Battery
- If you suspect a weak car battery, jump-start your vehicle.
- If the car starts and the interior lights and key fob function normally, the battery likely needs charging or replacement.
- Have your battery tested at an auto parts store or mechanic to determine its health.
4. Reprogram the Key Fob (If Necessary)
- If other solutions haven’t worked, you might need to reprogram your key fob.
- Refer to your owner’s manual for specific instructions on how to reprogram the key fob to your Subaru Outback model.
- If you’re uncomfortable with the process, a Subaru dealership or qualified locksmith can assist you.
When to Seek Professional Help
While these troubleshooting tips can often resolve the issue, certain situations call for professional assistance:
- You’re uncomfortable working with electrical components.
- You’ve tried the troubleshooting steps, and the problem persists.
- You suspect a more complex electrical issue.
In these cases, contact a qualified automotive electrician or take your Subaru Outback to a trusted dealership for diagnosis and repair.
Frequently Asked Questions
Q: How long do Subaru Outback key fob batteries last?
A: Typically, a Subaru Outback key fob battery lasts between 3 to 5 years, depending on usage.
Q: Can I drive my Subaru Outback with a blown fuse?
A: It’s generally not recommended to drive with a blown fuse. While some blown fuses might not prevent driving, they indicate a potential electrical issue that needs addressing.
Q: How much does it cost to replace a Subaru Outback key fob?
A: The cost of replacing a Subaru Outback key fob varies depending on the dealership or locksmith and whether programming is required. Expect to pay between $150 to $400 or more.
Need Further Assistance?
If you’re experiencing persistent issues with your 2018 Subaru Outback interior lights or key fob, Keyfobprog is here to help. Our team of automotive electrical experts specializes in Key Fob Programming, replacement, and resolving complex car electronic issues. Contact us at +1 (641) 206-8880 or visit our office at 1326 N Houston St, Amarillo, TX 79107, USA. We’re dedicated to getting you back on the road with a fully functional vehicle.
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