2017 Subaru Outback Won't Start

Common Causes for Your 2017 Subaru Outback Not Starting and How to Resolve Them

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Reviewed by
Andrew Hajjar
Written by RepairPal Car Genius
Updated January 14, 2025
0%
38% chance it's the
Battery
0%
27% chance it's the
Alternator
0%
20% chance it's the
Starter
0%
15% chance it's
Something else
The most common reasons a 2017 Subaru Outback won't start are a dead battery, an alternator problem, or failed starter.
  • Battery: A weak or failing battery can result in difficulty starting the engine and electrical system malfunctions.
  • Alternator: A failing alternator can result in insufficient electrical power, leading to battery drain and electrical system malfunctions.
  • Starter: A faulty starter motor or a weak battery can prevent the engine from cranking properly, leading to starting issues.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

What are the initial diagnostic steps to take when a 2017 Subaru Outback won't start?

When your 2017 Subaru Outback won't start, it's essential to approach the problem methodically to identify the root cause. Begin with the simplest solution by checking the battery; a dead or weak battery is often the primary culprit behind starting issues. If the battery is functioning well, the next step is to ensure there’s enough fuel in the tank, as running out of gas can easily be overlooked. Pay attention to any warning lights on the dashboard, as these indicators can provide critical insights into underlying problems. If everything appears normal with the battery and fuel, test the starter motor, as a malfunction here can prevent the engine from cranking. Additionally, inspect the ignition system components, including the ignition switch and spark plugs, for any signs of wear or damage. Finally, consider using an OBD-II scanner to check for error codes that can help pinpoint specific issues within the vehicle's systems. By following this structured diagnostic approach, you can effectively troubleshoot the starting problem and determine the necessary steps for resolution.

What are the common problems that could prevent a 2017 Subaru Outback from starting?

When troubleshooting starting issues with a 2017 Subaru Outback, it's essential to consider several common problems that could be at play. One of the first areas to check is the battery, as a dead or weak battery, along with corroded terminals, can significantly hinder the starting process. If the battery appears to be in good condition, the next step is to inspect the starter motor, as a malfunctioning starter may fail to crank the engine effectively. Additionally, issues within the fuel system, such as a clogged fuel filter or a faulty fuel pump, can prevent the engine from receiving the necessary fuel to start. It's also important to examine the ignition switch, as a defect here can stop the car from starting when the key is turned. Worn or faulty spark plugs can lead to ignition problems, making it difficult for the engine to fire up. Lastly, consider the Engine Control Module (ECM), as any faults in its sensors or wiring can disrupt the starting process. By systematically checking these components, you can identify and address the underlying issue preventing your Subaru Outback from starting.

How urgent is it to address the starting issue in a 2017 Subaru Outback?

When dealing with starting issues in a 2017 Subaru Outback, understanding the urgency of the situation is crucial for any DIY enthusiast. If the vehicle exhibits intermittent starting problems, it may seem less pressing; however, even minor symptoms can escalate into more severe issues if left unaddressed. Safety should always be a priority, as a vehicle that fails to start unexpectedly can pose significant risks to both the driver and passengers. Moreover, neglecting these symptoms can lead to further damage, resulting in costly repairs down the line. A reliable vehicle is essential for daily activities, and persistent starting problems can compromise that reliability, leading to inconvenient breakdowns. While some DIY repairs may be manageable, consulting a professional mechanic for a thorough diagnosis is advisable to accurately assess the urgency and root cause of the issue. By addressing starting problems promptly, you can ensure the safety of your vehicle, prevent additional damage, and maintain its overall reliability.

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