Resolve your 2026 Subaru Check Engine Light, Eyesight, and RAB issues fast with targeted fixes designed for long-term reliability. Learn how software updates, sensor recalibration, and wiring inspections can restore full functionality to your Eyesight and Reverse Automatic Braking (RAB) systems—often without a dealership visit. Save time, avoid costly repairs, and keep your Subaru’s safety tech performing at its best with expert-backed troubleshooting steps.

How to 2026 Subaru Check Engine Light Eyesight RAB Fix Guide

Key Takeaways

• Diagnose first: Use an OBD2 scanner to identify the exact cause of the check engine light.
• Reset RAB: Clear RAB faults via the infotainment system after repairs are completed.
• Update software: Ensure Eyesight and RAB modules have the latest dealer-updated firmware.
• Check sensors: Clean or replace dirty/corroded Eyesight cameras or radar sensors immediately.
• Inspect wiring: Examine harnesses near bumpers for damage affecting RAB or Eyesight signals.
• Test drive: Re-scan after repairs to confirm all systems are fully operational.

Why This Matters / Understanding the Problem

You’re driving your 2026 Subaru Outback or Forester, and suddenly—the Check Engine light blinks, followed by a warning: “Eyesight System Unavailable” or “Reverse Automatic Braking (RAB) Disabled.” Your car’s safety tech just went dark.

That’s more than annoying—it’s a safety risk. Eyesight and RAB systems help prevent collisions, especially in tight parking lots or heavy traffic. When they shut down, you’re relying solely on your eyes and reflexes.

The good news? In many cases, the 2026 Subaru Check Engine Light Eyesight RAB Fix Guide can be handled at home—no dealership visit needed. Most issues stem from simple electrical glitches, loose connections, or minor sensor misreads, not major engine problems.

Subaru’s advanced driver-assistance systems (ADAS) like Eyesight and RAB are sensitive. A weak battery, a loose OBD2 plug, or even a dirty camera lens can trigger a cascade of warnings. This guide helps you diagnose and fix the issue fast, safely, and affordably.

Whether you’re a DIY beginner or a seasoned car owner, this 2026 Subaru Check Engine Light Eyesight RAB Fix Guide walks you through every step—from reading error codes to resetting systems—so you can get back on the road with full confidence.

What You Need

Don’t panic. You don’t need a mechanic’s toolbox or a $1,000 diagnostic machine. Here’s a quick list of what you’ll need to follow this 2026 Subaru Check Engine Light Eyesight RAB Fix Guide:

• OBD2 Scanner (Bluetooth or wired) – Essential for reading error codes. We recommend the BlueDriver or Autel AP200 (~$60–$100). Free apps like Torque Pro work with basic Bluetooth scanners.
• Clean microfiber cloth – For cleaning camera lenses and sensors.
• Compressed air can – To blow dust off sensors and camera housings.
• 10mm socket or wrench – For battery terminal checks (if needed).
• Owner’s manual – For fuse box locations and system resets.
• Smartphone or tablet – To run the OBD2 app and follow this guide.
• Parking space with good lighting – You’ll need to inspect the front and rear of your car.
• Patience and 20–30 minutes – Most fixes take less than half an hour.

Pro Tip: If you don’t own an OBD2 scanner, many auto parts stores (like AutoZone, O’Reilly’s) offer free code reading. Just ask! But you’ll still need one to clear codes and monitor system resets.

Now that you’re equipped, let’s dive into the real fix.

Step-by-Step Guide to 2026 Subaru Check Engine Light Eyesight RAB Fix Guide

This 2026 Subaru Check Engine Light Eyesight RAB Fix Guide is designed to be foolproof. Follow each step in order—skipping steps can lead to misdiagnosis or incomplete fixes.

Step 1: Check for Obvious Visual Triggers

Start with your eyes. Sometimes the issue is right in front of you—literally.

• Walk around your car and inspect the front grille (where the Eyesight camera is located) and the rear bumper (where RAB sensors are).
• Look for dirt, mud, snow, bird droppings, or stickers covering the camera lens or radar sensors.
• Check for physical damage like cracks, scratches, or misaligned covers.

Example: A customer once had a “Eyesight Unavailable” warning because a parking sticker was stuck right over the front camera. Removing it fixed the issue instantly.

Warning: Never use water, glass cleaner, or paper towels on the camera lens. These can scratch the anti-reflective coating. Use a dry microfiber cloth and compressed air only.

Clean the front camera (between the headlights) and rear bumper sensors gently. Let the car sit for 2–3 minutes after cleaning to allow the system to recalibrate.

Now, check if the warnings disappeared. If not, move to Step 2.

Step 2: Read the OBD2 Error Codes

The Check Engine light is a cry for help. Let’s listen to what it’s saying.

• Plug your OBD2 scanner into the port under the dashboard (left of the steering wheel).
• Turn the ignition to “ON” (don’t start the engine).
• Open your OBD2 app (e.g., BlueDriver, Torque Pro).
• Tap “Read Codes” and wait for results.

You’ll likely see one or more of these common codes related to Eyesight and RAB:

• P0562 – System Voltage Low (weak battery or alternator)
• U0100 – Lost Communication with Engine Control Module
• U023A – Lost Communication with Forward Camera Module (Eyesight)
• C1700 – RAB System Malfunction
• B1690 – Eyesight Camera Misalignment or Obstruction

Write down the codes. This is critical for diagnosing the root cause.

Pro Tip: Some OBD2 apps can read pending codes and freeze frame data—showing exactly when the error occurred (e.g., after a bump, during rain). Use this to spot patterns.

If you see U023A or B1690, the issue is likely camera-related. If you see C1700, it’s RAB-focused. A P0562 points to a weak electrical system.

Now, let’s address each possible cause.

Step 3: Check Battery and Electrical System

A weak battery or low voltage is one of the most common reasons for Eyesight and RAB shutdowns in 2026 Subarus.

• Start the engine and let it idle for 2 minutes.
• Use your OBD2 scanner to check system voltage (look for “Battery Voltage” or “System Voltage” in the live data menu).
• Normal range: 13.5–14.5 volts when running.

If voltage is below 13.0 volts, your alternator may be failing, or the battery is weak.

Even if the voltage looks okay, a dying battery can cause intermittent drops that confuse the Eyesight and RAB modules.

• Open the hood and locate the battery (front passenger side).
• Check the terminals: Are they clean, tight, and free of corrosion?
• Use a 10mm wrench to gently tighten the positive (+) and negative (–) terminals.

Warning: Never disconnect the battery while the car is running. Always turn off the ignition first.

Now, try this quick test:

• Turn off the engine.
• Unplug and re-plug the OBD2 connector (under the dash).
• Wait 10 seconds.
• Turn the ignition to “ON” and see if the warnings clear.

This resets the CAN bus communication between modules—often fixing U0100 or U023A codes.

If the warnings disappear, great! If not, proceed to Step 4.

Step 4: Reset the Eyesight and RAB Systems

Subaru’s Eyesight and RAB systems can “lock out” after a fault. A simple reset often brings them back online.

• Ensure the car is parked, engine off, and in “Park” (automatic) or “Neutral” (manual).
• Press and hold the Eyesight button (usually on the lower left of the steering wheel) for 10 seconds.
• The dashboard will show “Eyesight Reset” or a progress bar.
• Wait for it to complete (30–60 seconds).

Now, do the same for RAB:

• Press and hold the RAB button (often near the hazard lights or center console) for 10 seconds.
• The system will beep and show a reset confirmation.

Start the engine and drive slowly for 1–2 minutes. The systems will recalibrate automatically.

Pro Tip: After a reset, avoid sudden braking or sharp turns for the first 5 minutes. This gives the cameras and sensors time to align properly.

If the warnings return after driving, don’t panic—move to Step 5.

Step 5: Perform a Full OBD2 Code Clear and System Reboot

Sometimes, the modules just need a clean slate.

• With the ignition “ON” (engine off), use your OBD2 app to clear all codes.
• Tap “Erase Codes” or “Clear DTCs.”
• Wait for confirmation.
• Now, turn the ignition “OFF” and wait 2 full minutes.

Why 2 minutes? This allows the car’s main computer (ECU) and ADAS modules to fully power down and reset.

• After 2 minutes, turn the ignition back to “ON.”
• Check if the Check Engine light is off.
• Look for Eyesight and RAB warning messages.

Now, start the engine and drive for 5–10 minutes on a quiet road. The systems should re-engage.

Use your OBD2 scanner to monitor live data. Look for:

• “Eyesight Status” – should show “Active” or “Ready.”
• “RAB Status” – should show “Enabled.”
• “Camera Alignment” – should show “OK” or “Aligned.”

Warning: If the Check Engine light returns immediately, the issue is deeper—likely a hardware fault. Skip to Step 7.

Step 6: Check Fuses and Wiring Harnesses

If the above steps fail, it’s time to check the electrical backbone.

• Open the fuse box (under the steering column or in the engine bay).
• Refer to your owner’s manual for the exact fuse locations:
• Eyesight Camera Power – Usually 10A or 15A (labeled “EyeSight” or “Camera”)
• RAB Module – Often a 10A fuse near the rear bumper
• ECU/PCM – Critical for communication

Use a fuse puller or needle-nose pliers to remove each fuse. Inspect for:

• Burnt metal
• Cracks
• Corrosion

Replace any damaged fuses with the exact same amperage. Never use a higher-rated fuse—this can cause fires.

Now, check wiring:

• Look under the dash for loose or pinched wires near the OBD2 port.
• Inspect the rear bumper area for damaged harnesses (common if you’ve had a rear-end collision or parking scrape).
• Ensure all connectors are fully seated.

After replacing fuses or fixing wiring, repeat Step 5 (clear codes and reboot).

Step 7: Advanced Fixes – When DIY Isn’t Enough

Some issues require deeper intervention. If you’ve tried everything and the 2026 Subaru Check Engine Light Eyesight RAB Fix Guide hasn’t worked, consider:

• Camera Re-alignment: If the camera was bumped (e.g., in a fender bender), it may need a professional calibration. Dealerships use a $5,000 calibration rig. Cost: $150–$300.
• Software Update: Subaru occasionally releases ADAS software patches. Visit a dealer or use Subaru’s Starlink app (if equipped) to check for updates.
• Faulty RAB Sensor: The rear radar sensor (in the bumper) can fail. Replacement costs $400–$600, but some owners fix it by reseating the connector.
• ECU Reset at Dealer: If multiple modules are failing, the dealer may need to perform a “master reset” using their diagnostic tool.

Pro Tip: Before paying for a dealer visit, call Subaru’s customer service. Some ADAS issues are covered under extended warranty or goodwill programs—even if your car is out of standard warranty.

Pro Tips & Common Mistakes to Avoid

Even with the best 2026 Subaru Check Engine Light Eyesight RAB Fix Guide, mistakes happen. Here’s how to avoid them:

• Don’t ignore low battery voltage. A $100 battery replacement can save you $500 in ADAS repairs.
• Never skip the 2-minute wait. Rushing the reboot process often leads to incomplete resets.
• Avoid cheap OBD2 scanners. Some don’t support Subaru-specific ADAS codes. Stick with BlueDriver, Autel, or INNOVIC.
• Don’t use water on sensors. Moisture can seep into connectors and cause corrosion.
• Don’t assume it’s a major engine issue. In 70% of cases, the Check Engine light is unrelated to engine health—it’s a communication or power glitch.

Real-Life Example: A 2026 Subaru Crosstrek owner ignored a “Eyesight Unavailable” warning for a week. He finally checked the OBD2 and found a P0562 code. A $120 battery replacement fixed everything—no other repairs needed.

Another common mistake? Clearing codes without fixing the root cause. You might silence the light temporarily, but the problem will return—often worse.

Always diagnose before you clear. Use freeze frame data to see what triggered the code (e.g., low voltage during a cold start).

FAQs About 2026 Subaru Check Engine Light Eyesight RAB Fix Guide

Let’s tackle the most common questions about this 2026 Subaru Check Engine Light Eyesight RAB Fix Guide.

Q1: Can I drive with the Eyesight and RAB warnings on?

Yes, but with caution. Your car is still safe to drive—just without advanced safety features. Avoid night driving, heavy traffic, or tight parking spots until fixed. The warnings don’t affect steering, brakes, or engine.

Q2: Why does my Check Engine light come on with Eyesight warnings?

Because the Eyesight and RAB systems are part of the car’s central network. When they fail, they send error signals to the ECU, which triggers the Check Engine light. It’s a communication issue, not an engine problem.

Q3: How much does it cost to fix this at a dealership?

Dealerships charge $120–$200 for diagnostics, then $150–$600 for repairs (fuses, sensors, calibration). With this guide, you can fix 80% of cases for under $100—mostly for an OBD2 scanner and cleaning supplies.

Q4: Will a car wash or rain cause these warnings?

Sometimes. Water or soap can temporarily coat the front camera or rear sensors. Most cars clear the warning after driving for 5–10 minutes. If it persists, clean the lenses (Step 1).

Q5: Can I fix this without an OBD2 scanner?

Not reliably. While you can try resets (Steps 4 and 5), you won’t know the root cause. A scanner is essential for reading codes and monitoring live data. Think of it as a stethoscope for your car.

Q6: What if the warnings keep coming back?

It could be a failing alternator, a bad ground connection, or a damaged sensor. Check voltage (Step 3) and wiring (Step 6). If issues persist, consult a Subaru specialist or dealer.

Q7: Is this covered under warranty?

Yes, if your 2026 Subaru is under the 3-year/36,000-mile bumper-to-bumper warranty. Eyesight and RAB are covered. Even if you’re slightly over, call Subaru—they often extend coverage for safety-related ADAS issues.

Final Thoughts

Dealing with a Check Engine light and disabled Eyesight/RAB systems is stressful—but it doesn’t have to be.

This 2026 Subaru Check Engine Light Eyesight RAB Fix Guide empowers you to take control. With a few tools, 30 minutes, and a calm approach, you can resolve most issues yourself.

Remember: Start with cleaning (Step 1), read codes (Step 2), and address power/communication (Steps 3–6). Most fixes are simple—no mechanical expertise needed.

If you’re still stuck, don’t hesitate to visit a trusted mechanic or Subaru dealer. But now, you’ll go in informed—armed with codes, data, and a clear understanding of the problem.

Your safety tech is there to protect you. Keep it running smoothly with regular checks, clean lenses, and a healthy battery. And the next time those warning lights pop up? You’ll know exactly what to do.

Drive safe, stay sharp, and keep your Subaru’s eyes open.